I agree with
sreevirus. Do not install SLAX on harddisk. If you like it a lot then go for
Slackware. SLAX is based on Slackware only. Even though Slackware is a pretty fine distro, one must have a little bit knowledge of Linux conf files. You will have to setup a few things manually in Slackware. No intentions to discouraging you. A quick read of
Slackbook will give you in-depth knowledge of Slackware and Linux in general. You will learn a lot, definitely.
Ubuntu, Fedora, OpenSUSE and a few other distros are fine for new users.