I must have had a bad couple of days for some reason, the game crashed like crazy for 2 days in a row, then after that I played all day (and finished it, too, at least the main storyline) and not a single crash. I still saved like crazy just in case, though.
the game is quite buggy with or without tu's my retail xbox with origional disc installed to hdd crashes every now and then. it is a little more stable with the latest tu and you can use dlc with it too.
XPGameSaves requiring you to reply to a post to download files is ridiculous. It should only require you to like the post, like OPgames does. Anyway this is my post to access the content.