diff --git a/launcher/modplatform/modpacksch/FTBPackInstallTask.cpp b/launcher/modplatform/modpacksch/FTBPackInstallTask.cpp
index cac432cdd..c888ef227 100644
--- a/launcher/modplatform/modpacksch/FTBPackInstallTask.cpp
+++ b/launcher/modplatform/modpacksch/FTBPackInstallTask.cpp
@@ -40,25 +40,32 @@
 #include "Json.h"
 #include "minecraft/MinecraftInstance.h"
 #include "minecraft/PackProfile.h"
+#include "modplatform/flame/PackManifest.h"
 #include "net/ChecksumValidator.h"
+#include "net/Upload.h"
 #include "settings/INISettingsObject.h"
 
 #include "BuildConfig.h"
 #include "Application.h"
+#include "ui/dialogs/ScrollMessageBox.h"
 
 namespace ModpacksCH {
 
-PackInstallTask::PackInstallTask(Modpack pack, QString version)
+PackInstallTask::PackInstallTask(Modpack pack, QString version, QWidget* parent)
 {
     m_pack = pack;
     m_version_name = version;
+    m_parent = parent;
 }
 
 bool PackInstallTask::abort()
 {
     if(abortable)
     {
-        return jobPtr->abort();
+        if (modIdResolver)
+            return modIdResolver->abort();
+        else if (jobPtr)
+            return jobPtr->abort();
     }
     return false;
 }
@@ -118,7 +125,7 @@ void PackInstallTask::onDownloadSucceeded()
     }
     m_version = version;
 
-    downloadPack();
+    resolveMods();
 }
 
 void PackInstallTask::onDownloadFailed(QString reason)
@@ -127,13 +134,92 @@ void PackInstallTask::onDownloadFailed(QString reason)
     emitFailed(reason);
 }
 
+void PackInstallTask::resolveMods()
+{
+    setStatus(tr("Resolving mods..."));
+
+    Flame::Manifest manifest;
+    indexFileIdMap.clear();
+    int index = 0;
+    for(auto file : m_version.files) {
+        if(!file.serverOnly && file.url.isEmpty()) {
+            if(file.curseforge.file <= 0)
+                emitFailed("Invalid manifest");  // TODO better error
+
+            Flame::File f;
+            f.projectId = file.curseforge.project;
+            f.fileId = file.curseforge.file;
+            f.hash = file.sha1;
+
+
+            manifest.files.insert(f.fileId, f);
+            indexFileIdMap.insert(index, f.fileId);
+        }
+        index++;
+    }
+
+    modIdResolver = new Flame::FileResolvingTask(APPLICATION->network(), manifest);
+
+    connect(modIdResolver.get(), &Flame::FileResolvingTask::succeeded, this, [&]()
+    {
+        abortable = false;
+
+        //first check for blocked mods
+        QString text;
+        auto anyBlocked = false;
+
+        Flame::Manifest results = modIdResolver->getResults();
+        for(int index : indexFileIdMap.keys())
+        {
+            int fileId = indexFileIdMap[index];
+            Flame::File foo = results.files[fileId];
+            VersionFile &bar = m_version.files[index];
+            if (!foo.resolved || foo.url.isEmpty())
+            {
+                QString type = bar.type;
+                type[0] = type[0].toUpper();
+                text += QString("%1: %2 - <a href='%3'>%3</a><br/>").arg(type, bar.name, foo.websiteUrl);
+                anyBlocked = true;
+            } else {
+                bar.url = foo.url.toString();
+            }
+        }
+        if(anyBlocked) {
+            qWarning() << "Blocked files found, displaying file list";
+
+            auto message_dialog = new ScrollMessageBox(m_parent,
+                                                       tr("Blocked files found"),
+                                                       tr("The following files are not available for download in third party launchers.<br/>"
+                                                          "You will need to manually download them and add them to the instance."),
+                                                       text);
+            message_dialog->setModal(true);
+            message_dialog->show();
+            connect(message_dialog, &QDialog::rejected, [&]() {
+                modIdResolver.reset();
+                emitFailed("Canceled");
+            });
+            connect(message_dialog, &QDialog::accepted, [&]() {
+                modIdResolver.reset();
+                downloadPack();
+            });
+        } else {
+            modIdResolver.reset();
+            downloadPack();
+        }
+    });
+    connect(modIdResolver.get(), &Flame::FileResolvingTask::failed, this, &PackInstallTask::onDownloadFailed);
+
+    modIdResolver->start();
+    abortable = true;
+}
+
 void PackInstallTask::downloadPack()
 {
     setStatus(tr("Downloading mods..."));
 
     jobPtr = new NetJob(tr("Mod download"), APPLICATION->network());
     for(auto file : m_version.files) {
-        if(file.serverOnly) continue;
+        if(file.serverOnly || file.url.isEmpty()) continue;
 
         QFileInfo fileName(file.name);
         auto cacheName = fileName.completeBaseName() + "-" + file.sha1 + "." + fileName.suffix();
diff --git a/launcher/modplatform/modpacksch/FTBPackInstallTask.h b/launcher/modplatform/modpacksch/FTBPackInstallTask.h
index ff59b695c..a85f360a9 100644
--- a/launcher/modplatform/modpacksch/FTBPackInstallTask.h
+++ b/launcher/modplatform/modpacksch/FTBPackInstallTask.h
@@ -19,9 +19,13 @@
 
 #include "FTBPackManifest.h"
 
+#include "QObjectPtr.h"
+#include "modplatform/flame/FileResolvingTask.h"
 #include "InstanceTask.h"
 #include "net/NetJob.h"
 
+#include <QWidget>
+
 namespace ModpacksCH {
 
 class PackInstallTask : public InstanceTask
@@ -29,7 +33,7 @@ class PackInstallTask : public InstanceTask
     Q_OBJECT
 
 public:
-    explicit PackInstallTask(Modpack pack, QString version);
+    explicit PackInstallTask(Modpack pack, QString version, QWidget* parent = nullptr);
     virtual ~PackInstallTask(){}
 
     bool canAbort() const override { return true; }
@@ -43,6 +47,7 @@ private slots:
     void onDownloadFailed(QString reason);
 
 private:
+    void resolveMods();
     void downloadPack();
     void install();
 
@@ -50,6 +55,9 @@ private:
     bool abortable = false;
 
     NetJob::Ptr jobPtr;
+    shared_qobject_ptr<Flame::FileResolvingTask> modIdResolver;
+    QMap<int, int> indexFileIdMap;
+
     QByteArray response;
 
     Modpack m_pack;
@@ -58,6 +66,8 @@ private:
 
     QMap<QString, QString> filesToCopy;
 
+    //FIXME: nuke
+    QWidget* m_parent;
 };
 
 }
diff --git a/launcher/modplatform/modpacksch/FTBPackManifest.cpp b/launcher/modplatform/modpacksch/FTBPackManifest.cpp
index e2d47a5bb..a8c0f6b80 100644
--- a/launcher/modplatform/modpacksch/FTBPackManifest.cpp
+++ b/launcher/modplatform/modpacksch/FTBPackManifest.cpp
@@ -127,13 +127,16 @@ static void loadVersionFile(ModpacksCH::VersionFile & a, QJsonObject & obj)
     a.path = Json::requireString(obj, "path");
     a.name = Json::requireString(obj, "name");
     a.version = Json::requireString(obj, "version");
-    a.url = Json::requireString(obj, "url");
+    a.url = Json::ensureString(obj, "url");  // optional
     a.sha1 = Json::requireString(obj, "sha1");
     a.size = Json::requireInteger(obj, "size");
     a.clientOnly = Json::requireBoolean(obj, "clientonly");
     a.serverOnly = Json::requireBoolean(obj, "serveronly");
     a.optional = Json::requireBoolean(obj, "optional");
     a.updated = Json::requireInteger(obj, "updated");
+    auto curseforgeObj = Json::ensureObject(obj, "curseforge");  // optional
+    a.curseforge.project = Json::ensureInteger(curseforgeObj, "project");
+    a.curseforge.file = Json::ensureInteger(curseforgeObj, "file");
 }
 
 void ModpacksCH::loadVersion(ModpacksCH::Version & m, QJsonObject & obj)
diff --git a/launcher/modplatform/modpacksch/FTBPackManifest.h b/launcher/modplatform/modpacksch/FTBPackManifest.h
index da45d8ac9..0451127a6 100644
--- a/launcher/modplatform/modpacksch/FTBPackManifest.h
+++ b/launcher/modplatform/modpacksch/FTBPackManifest.h
@@ -97,6 +97,12 @@ struct VersionTarget
     int64_t updated;
 };
 
+struct VersionFileCurseForge
+{
+    int project;
+    int file;
+};
+
 struct VersionFile
 {
     int id;
@@ -111,6 +117,7 @@ struct VersionFile
     bool serverOnly;
     bool optional;
     int64_t updated;
+    VersionFileCurseForge curseforge;
 };
 
 struct Version
diff --git a/launcher/ui/pages/modplatform/ftb/FtbPage.cpp b/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
index 8a93bc2e3..693ee8840 100644
--- a/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
+++ b/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
@@ -126,7 +126,7 @@ void FtbPage::suggestCurrent()
         return;
     }
 
-    dialog->setSuggestedPack(selected.name + " " + selectedVersion, new ModpacksCH::PackInstallTask(selected, selectedVersion));
+    dialog->setSuggestedPack(selected.name + " " + selectedVersion, new ModpacksCH::PackInstallTask(selected, selectedVersion, this));
     for(auto art : selected.art) {
         if(art.type == "square") {
             QString editedLogoName;