I need to repartition my hard disk because there's not enough room on my C:\
partition, so I'm just covering myself in case things go wrong.
Are you aware that, although no version of Windows before Vista or DOS
has ever had the ability to change the partition structure of a drive
without losing all the data on it, it is possible with the use of a
third-party program. Partition Magic is the best-known such program,
but there are shareware/freeware alternatives. One such program is
BootIt Next Generation. It's shareware, but comes with a free 30-day
trial, so you should be able to do what you want within that 30 days.
I haven't used it myself (because I've never needed to use *any* such
program), but it comes highly recommended by several other MVPs here.
However if you use such a program, be sure you have a good backup of
anything you can't afford to lose. Although there's no reason to
expect a problem, things *can* go wrong.
You're welcome. Glad to help.