[minecraft wont start]

It appears as though you need to update some of your mods. Try deleting Thaumcraft 4, then see if the game launches. IF it does, update thaumcraft to the latest version, install it and try again.

[How to make forge run with the "create profile" function in minecraft launcher?]

Duh. I know how to use Forge. That wasnt what i asked

You can create multiple profiles in the manager. But if you allready install forge in for an example a roaming folder called "Minecraft (123)", you are unable to run it as forge, even though you have forge installed inside that folder.

[How to make forge run with the "create profile" function in minecraft launcher?]

Its a simple question. The soloution may not be as simple. I have multiple personal modpacks, and was wondering if it was in any way possible to make "forge" appear as a minecraft version if you create a new profile from the profile manager. I have tried using a folder which has minecraft forge installed, but when i run it no mods will load. This is of course because i can't run minecraft forge as a version of minecraft through this fairly new function (i think its new at least). Anyone found a way to do this? Thanks.