Sounds like there's a problem with the CD your trying to use, I would have to say, try and get hold of WinXP including SP1 and then do a fresh install of XP without the other OS's being installed first.

The problem could also be with your HDD, try downloading any diagnostic apps for your make of drive. Try also cleaning the lens of your CDROM if you've had it a while it could be unclean and cause some files not to be read properly. Check your memory had no errors, Microsoft has a memory checker you can download, just do a search on the MS website, it's the only version of the app so shouldn't be too hard to find.

Also you may want to make sure there's not too much dust inside your computer, can always make things either over heat or just simply currupt.

Coffee.