Hi guys!
Just letting you guys know that if your using a Windows Computer (im using XP) when you extract the files from the Modpack it will combine with the OldModpack in the same file so id advise deleting or moving the Old Modpack file to a different location. So if your getting a black screen after installing the Modpack this is probably whats happening. By the way the NEW modpack folder is called FuzzyPack.
Hop This Helps!