John;
Do you mean remove that option from disk Clean-up?
http://support.microsoft.com/?kbid=812248
Or
Follow this link:
http://www.kellys-korner-xp.com/xp_tweaks.htm
Line 48, Right column "Disk Cleanup - Compress..."
Save on Desktop.
Double click the icon once downloaded.
The icon can then be discarded.

Signature
Jupiter Jones [MVP]
An easier way to read newsgroup messages:
http://www.microsoft.com/windowsxp/pro/using/newsgroups/setup.asp
http://www3.telus.net/dandemar/
> how to delete compress old files