u can get it off bittorrent also. Its simple, burn it as image, then boot with it, and fallow instructions. Depending on the distro u choose, i would do a lot of reading b4. especially with ones like slakcware. go to www.linuxquestions.org
A user friendly one is suse 9.1 its only 1 cd.
slackware is a real good one, but quit complicated to install at 1st.
Look up my older posts about linux, there are a few links that could be usefull to you.