Is there a way to either upgrade from ubuntu 9.10 to windows xp using the windows xp reinstallation dell disk, OR do a clean install of windows xp using the reinstallation disk. If there is ANY way possible please answer. Thanx in advanced

I have already done everything else I can think of to free up disk space: Removed some programs; ran ccleaner; did disk defrag; cleaned up registry errors. If anyone has any other suggestions-I would very much appreciate it. I’m running Windows Vista Home Premium.
O.K. I get it it. I guess it’s time to buy an external hard drive. Thanx to those who answered.