I concur with PCGold -- Partition Magic is a good program. However, ensure that you make regular backups, for the following reason.
I had Partition Magic on my Win95 system and was using the first physical partition on the second physical drive to store my important files. I assumed that, even if there was a failure of some sort, the first partition would be readable.
That turned out not to be true. When I had a crash and reinstalled Win95, the second physical drive was totally unreadable. Neither Partition Magic nor Norton Utilities could find the partition information on that drive. I lost several months' worth of work. I don't know why it happened, but I think that the Win95 reinstall somehow corrupted the partition information.
Don't let this steer you away from the program, because I haven't personally seen anything better, and the current version is probably improved over the one I have anyhow. I just wanted to add a brief warning. We should all be doing our backups anyway, right?
Good fortune,
Don