While trying to shut down GoBack during a run of Norton's SpeedDisk (bad idea!), I got a fatal error from GoBack and a reboot. Now the C: partition is not found.

Using the Partition Magic rescue disk I seem to have the other two partitions on my drive, but not C:. I can even give the letterless drive a label.

I know that the data etc. on C: is gone, but how do I get the letter back?

Windows 98 SE, Western Digital 10Gig drive with 3 partitions.