Parted Magic: http://partedmagic.com/doku.ph.....PinmJHXbUE
I prefer to partition my disks with a 3rd party partitioning tool such as Parted Magic or GParted prior to installation. I try to stay away from the windows disk management tool except for altering partitions that do not have to do with an installation of any sort. You can download them at the above links. You will download an iso file. You will have to burn it as an image to CD. There are plenty of software to this, I use Imgburn or Infrarecorder. Once you burned the image to CD you will need to boot off the CD. If you are unfamiliar with partitioning I would read some about the subject prior to proceeding.
BTW to reduce confusion the "drives" you refer to are technically not drives, but rather are "partitions" on a physical hard disk.
P.S. Make sure you have a backup of all data you don't want to lose on something not connected to your machine while doing partitioning and installations. remember Murphy's law does apply here. Sometimes shit happens. Don't be the one caught with your pants down saying you lost your data. Then you will have to hope recuva or testdisk can recover your files, not always guaranteed!