1. Back up all your data
2. Install XP. Make sure that you partition it.
3. After installing xp install linux on the other dirve

Windows wont be able to see linux (EXT3 partition). For that i used
http://www.fs-driver.org/download.htm

What this might mean is that he installed Windows after Ubuntu, and can no
longer boot the latter. You might verify what I'm about to say from some other
source, because I haven't done it in a long time. Use the Ubuntu disk to boot,
and in a terminal window reinstall GRUB:

>root (hd0,x) (the partition in which GRUB is installed)
>setup (hd0)
>quit

You should be able to boot into Ubuntu. If Windows wasn't installed before,
though, you'll have to add a stanza to /boot/grub/menu.lst to make it show up in
the boot menu.

Yes it best to load XP first. As you say you can reload the Grub and edit
the the list as sudo.

Ok well I completely reformatted my laptop so I have just win xp on it. Is
it best to go in and use gparted to resize the drive and make a new
partition or is there some other way that is better and more stable?

Ubuntu CD will take care of the partition for you giving you the choice of
size. Just run it.