I have a Dell latitude 266mhz/128meg ram/6gig hard drive
It does a faceplant if you try new Suse, Mandriva, Slack, any distro if you are intent on running kde..........except for two that I have found. Vector runs not too bad, used it for about a year. Just tried Slax, and was knocked over. Slax running kde, added firefox 1.5, java and a few other modules and it was opening appz faster than it could with Win98se. No kidding, it is really fast. There is an installer script on the live cd to install it to hard drive if you so choose, which I did. I suggest you try out the live disk on your laptop, even if you install other distros to the hard drive to try out, I think you will be very impressed.