Get back the Linux Partition when Windows Xp is reinstalled

How do i get back the Linux Partition when Windows Xp is reinstalled?

I think if you boot from your linux cd, you have an option to recover, repair your linux installation. Most probably winxp deleted GRUB entries from MBR. Therefore it should be possible to get it back working.

If you are using LILO bootloader
http://www.linuxforums.org/forum/installation/32979-how-overright-mbr-linux-windows-dual-boot.html
for GRUB
http://linuxhelp.blogspot.com/2005/11/how-to-repair-corrupt-mbr-and-boot.html