When i open my mw2 MP FD1 it loads and the FD1 style Mp screen is there but then it just crashes and i updated it, i installed it the way way your suppose to but it doesn't work im trying to fix it now ill let you guys know if i fix it and is anyone else getting this error

Try step 2 on this thread:

viewtopic.php?f=7&t=4144

Crashes on main menu are usually missing content from the IWD files.

I was just crashing as well, sometimes the FL bugs out. That's what was happening for me..