That depends on exactly what you did. If you repartitioned your drive and deleted the original Windows partition then, well... I'd say you're hooped and it's better that it happened to you and not me.
If you didn't delete the partition then it's still there. I doubt you would be able to mount it as swap space as it has the wrong signature. None of the linux installs I've use have ever just gone and deleted partitions without EXPLICIT instructions to do so. You have to pull the trigger.
Does Win2K have a boot floppy with something like fdisk on it? Use it, but DON'T DO ANYTHING YET! Just see if your Windows partition is still alive. If it's still there you need to rewrite the master boot record (MBR). I don't knowWin2K, but under Win3x to Win9x/ME you could use
Use uppercase characters.