Ummm, I don't thank you can without hacking the games EXE and DLLs (Which is hard as hell!)
Even with map triggers i don't thank you can effect the games menus and how they work like saving limits but I do think you can use map triggers to save games at locations, say you open up a door and go out side and die the trigger will make you start at the door rather than the game menu, but there is a down side (you still need to save!). this feature will be in Last Vegas not in Enclave II.