messed up with /boot and /usr

hi. . . im a idi** i was trying to retrieve my MBR (slackware being the main) when it was over writed by Vector5.8's MBR.. sad to say when i inserted the slack cd.. and tried mounting the partitions of my slack (since i have separate parititons for /, /boot, /tmp, /home, /usr, /var etc.. ) i accidentaly RM the mounted partition of /boot :

eg.

>/mnt mount /dev/hdc6 (boot partition) /mnt/testboot

>/ rm testboot

> cannot rm : resource or drive is busy...

>/ umount /dev/hdc6 /mnt/testboot

but when i tried mounting it again.. its gone :(


i cannot anymore boot my slack