Dual booting XP with Ubuntu already installed

[Shmew]

I installed Ubuntu the other day it's almost everything I wanted it ot be but I have been having trouble using wine to run games, so I was wondering how would I go about installing xp with Ubuntu so that if I want ot play a game I can just restart under XP and play what ever game I want?

[Kareeser]

You would have to first resize your hard drive so that Windows can install onto the freed space on its own partition.

Once that is completed, you will notice that GRUB was erased, since Windows installs its own boot loader.

You'll have to then follow the instructions here:
https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows