Win2k

I have windows XP as an OS right now.

I want to install Windows 2000 Pro, but when I insert the disk it says "You have a newer version of windows already installed. The setup features on this disk will now be diabled."

So as you can see I cannot install Win2000 because I dont have access to setup files.

Anyway to get around this?

yes....start the windows XP setup and choose to format the partition that you have installed windows on....if you cant format it try removing it first, then format the unpartitioned space...
now you can install win2k

Another idea , create new partition using PMAGIC . Then hide your partition (so this won't affect files from XP or Win2000) .Then use that tool Partition Magic boot to activate your hiddent partition and install XP or whatever . I'm using this way , I have Win2000 pro , Win2000 Server , XP .