Aah. Presumably you had grub chain-loading windows xp, so by formatting the linux partition you've lost your bootloader....
Have you tried booting using a windows CD and getting into the recovery console?
From in there you just need to mark the windows partition as 'active' (using fdisk) and possibly run fixmbr / fixboot to make your machine boot back into windows again.
Have you tried booting using a windows CD and getting into the recovery console?
From in there you just need to mark the windows partition as 'active' (using fdisk) and possibly run fixmbr / fixboot to make your machine boot back into windows again.