You don't have to repartition the drive, but that might be the best option.
You could simply use FDISK to create an additional partition in the rest of
the drive.  Make it an extended partition, then create whatever logical
drives you need in the extended partition in order to gain access to the
rest of the space.  Put as much as possible of you data and installed
application in these logical drives, so as to preserve the C drive for
important operating system stuff.
--
Jeff Richards
MS MVP W95/W98