If you are running linux on an un-tweaked EEE it is probably xandros linux, which is OK, but basically rubbish if you want to update it or play with it, or add things to it.
I have ubuntu 10.04 running well on my ancient eee701 4G (with a big SD card). It took a while, but works very, very well.
There is much help available here: http://wiki.eeeuser.com/
and here: http://forum.eeeuser.com/
Please read those links, especially about "Installing other linux distros on your EEE".
Welcome to LQ, but I think you need an EEE-specific site to get you started on the right path.