check out slackware, not hard to install and the minimum system requirements are tiny. I installed 9.1 a while ago with no problems.
http://www.slackware.com/index.php
http://www.slackware.com/install/sysreq.php
Slackware Linux doesn't require an extremely powerful system to run (though having one is quite nice
. It will run on systems as far back as the 486. Below is a list of minimum system requirements needed to install and run Slackware.
* 486 processor
* 16MB RAM (32MB suggested)
* 100-500 megabytes of hard disk space for a minimal and around 3.5GB for full install
* 3.5" floppy drive
Additional hardware may be needed if you want to run the X Window System at a usable speed or if you want network capabilities.