I have found a pack for mame title screens, it seems to cover most if not all games. Originally from pleasuredome as the readme sez.
5,952 title screens. Not bad really

Google this: "mame titles 0.134 torrent" if you did it right you will get the page as the first hit, top of the list!
Once you have all the screenshots, drop then in your FBL artwork folder.
IMPORTANT: Put the first 4088 screenshots in the "artwork/shots 1" folder and the rest in "artwork/shots 2" as the xbox has a max files in folder of 4089 files (there is already a file in each folder y'see.)
Now if you want dual pane titles and videos you need to get your hands on a decent video pack. I used the one from coinops showcase and dropped that into the video folder in FBL. However there is only 830-odd videos so only a few will show with videos (dual pane) but hey thats better than nowt.
If anyone knows where to get a massive mame video pack hit us up! Asked resx if he knew of any but unfortunately he is leaving mame till last

Hey guys. I found a full video preview pack for MAME 135 on a newsgroup. It's 16 gigs though, and all are in avi. I'm prolly gonna get it. However we are going to need a batch file converter similar to nes's tool he included in Zsnexbox to bulk change avi to wmvv8, then convert them to xmv. Is there a program that can do this efficiently? Like an avi to wmv specific codec converter?
Also it seems all the file names are the same so they should match up with the roms, but i have to double check this when i get a chance...