Hello,
So I tried to make a modpack for me and my friend and i have done the following steps:
Made 4 folders (bin,config,coremods and mods)
Downloaded forge.jar and renamed it to modpack.jar (for minecraft 1.6.4)
Downloaded a bunch of mods and copied them to mods folder.
Downloaded coremods and copied them to coremods folder.
Added it to ZIP archive with compression method to best (had some problems with unzipping so this fixed it)
Uploaded it to cloud (Used Ubuntu One)
Added info to technicpack.net (Link)
When i tried to play it the launcher just closes and then opens.
I copied the log from console (I think that's it)
I hope thet someone will answer soon:D