Mame database files

I have a Mame .177 set, and when I scanned the directory, a lot of games were missing from the scan (Like all of the Tekkens). It sorted the games into an FBA playlist. I’m a little confused by that because my set is .177, and the official mame is .174, so I shouldn’t be missing so many games. Can someone tell me what’s going on here?

Is it possible to get database files for other sets than ‘mame’ and ‘mame2003’? That seems to be the only thing I can download through the online updater.

I really don’t want to go to all the trouble of using clrmame pro, I have a nice set and I’d like to keep it that way. Any help would be much appreciated.

Nevermind, just found this. http://libretro.com/forums/showthread.php?t=6618&highlight=mame+data