Hi

It's pretty normal to get a GUI interface with 64 Mb. I used knoppix in my compaq 1277 with 64 mb and works fine (used in development with java)

You will need 128 if you want to use Open Office. There is no way that OO will run in less than 128. I try in a machine with 512 and still takes all the time of the world to init.

With your machine you will get a lot of fun using knoppix. But if you want some more speed and still want GUI you should try Damm Small Linux or "Feather Linux" (ftp://ftp.berlios.de/pub/featherlinux/feather-0.3.3.iso) (both stripped versions of knoppix)