If you want to get back into your windows partition, you can use your WinXP cd as a recovery console, and if you can figure out how to get to a repair console you can type
"fixmbr" or if that doesn't work "fdisk /mbr". However this will prevent you from getting back into your linux.
CtPoem: if you want a boot disk www.bootdisk.com
has all the boot disks you could need, so you may want to try one from there.