There is a software tools out there will do it. Partition Magic is what I have used. its a GUI interface and pretty simple to use.
I have just installed WinXP Pro on a new 200 Gig HDD, intending to have three equal sized partitios, all NTFS.
However, I ended up with only two partitions, the second being twice the size of the first. Grrrrrr!
Can I now divide this second partition into two, after the event, so that I end up with the desired three partitions, using Disk Management?
There is nothing on this partition (D) at the moment, while, of course the OS is on (C).