Hi Harp00. I'm a fellow MAME'r.
I can't help you with the ROMs, as posession of ROM images without owning the actual game is utterly illegal. Posting how to get them on this board is of questionable legal and moral nature, so I'll not do so. Sorry.
As far as Xmame, just download the latest rpm/tarball, whichever you like. It works pretty well.
For a frontend, I use GXmame.
The latest Xmame source tarball can be found at http://x.mame.net/download/xmame-0.71.1.tar.bz2
(But please go to http://x.mame.net
and look around their site. Generally, it is a bad idea to direct link someone else's downloads, and I know I just broke that courtesy rule.)
The latest version of GXmame can be found at http://gxmame.sourceforge.net/downloads.php