Try SuSE 9.1 it is free. it is a little hard to find but it is very stable. I even managed to get it running on my uncles computer. AMD K6 233MHz,4 Gig HD,Ancient sound card,trident 9860 video card,84 MB Ram,1997 Mother Board.It ran pretty good.It even managed to get the soundcard working without having to install drivers.when he had windows on it i had to search hi and lo for a driver for the soundcard. www.suse.com (http://www.suse.com) It takes up alot of space about 1.2 GB and it is very easy to insall all you need is a highspedd internet connection and a burner.
(http://www.suse.com)