Don't delete the swap partition. Keep it to run Tiny Core.
Ubuntu 9.10 probably uses ext4. Is that correct? Format the partition with Ext3 for Tiny Core.
You can install Grub from Tiny Core, and it works.
For Windows XP, use:
title Windows
root (hd0,1)
savedefault
makeactive
chainloader +1
For more information about installation, see:
http://tinycorelinux.com/install.html[removed due to policy violation]/net-install.html
Click on links for other subjects.