Pointing FML at a different folder

[Ethan]

I have a separate install of Minecraft at %APPDATA%\.example that I want to use as a test environment. I have a custom launcher set up to point to my directory, but once Minecraft starts up FML still looks in %APPDATA\.minecraft. How can I tell it to use my folder (or ..\) as the working directory?

[WildCard65]

Try studying how MultiMC launches minecraft.