I just installed FCOM today. Since it's been years since I've last played/installed mods for oblivion I went for a basic install using nUbees guide ( https://docs.google.com/file/d/0B8BTIQGFFmHPWmNCbVdSUXFDRXc/edit?pli=1 ) word to word. However, like that, the game CTDs on the IC waterfront, near the anvil lighthouse and at several other places too. I fiddled around with deactivating the mods one by one and it turned out that the MMM mod is causing the crashes. How is FCOM installed correctly? I'd really like to play it, it's one of the big modpacks I can't enjoy oblivion half as much without.
The game is a clean install with all possible DLC's and the mods/patches mentioned in the nUbee install guide.