Windows problem

This is gay.

It won't let me install windows 2k on this computer. I'm using xp right now. It says that the cd i'm trying to use is older version of windows therefore installation of windows 2k will be disabled.

there isn't an option to install from scratch,
and i don't have a bottable cd, i don't think, just the img which i burned to disc, which i put it, but i dunno how to boot from it.