Modifying your primary OS partition

So here's the scenario that got me into posting this. One of the sysadmins created a new virtual machine in VMWare by cloaning another. The original only had a 20GB drive, but he wanted it to be 40GB. He added the needed space, and then was going to use a partitioning tool to modify the OS partition. Well, he found out that VMWare didn't like his partition tool and wouldn't allow it to boot so at that point I pointed out that he could just use diskpart. Apparently he was under the assumption that diskpart wouldn't allow him to mess with the primary partition... but he soon discovered otherwise. All you need to do to be able to use diskpart to manage your partitions outside of windows is do the following...

1. Get a WinPE 2.0 disc, or a Windows Vista/7 disc
2. On the WinPE disc, just get to command prompt, which should be super easy. On the Windows installation discs, you'll need to select your language, click Install Now, then click SHIFT + F10.
3. Once the command prompt is up, type diskpart. You'll then see your prompt change from X:\> to DISKPART>
4. At this point if you don't know what commands you need, you can go to the below link to read up on it.
   http://technet.microsoft.com/en-us/library/cc766465%28WS.10%29.aspx

Enjoy