Renaming the "windows" bootcamp drive ID

Actually, you are talking about renaming the drive itself. The label in the GPT partition map is what MacOS X calls the volume everywhere (Finder, Startup Control Panel, etc..). The label on the MBR is what Windows will call it (same deal there, everywhere uses the same values). The only odd duck can be the EFI chooser screen (what you get when you hold down option a boot), that actually uses a pre-rendered image as the label, and in weird cases this can get messed up (in which cases it defaults to a not-as-nicely rendered version of what is guesses is the name). Using the "--label" option in the "bless" command can get you around this (or into custom setups).

Executive version: rename it in the Finder and you will get what you want.

Edit: I should have mentioned that MacOS X does a good job of keeping the EFI partition map and the MBR in sync, so I have never seen those labels out-of-sync.

 

rEFIt can help you there: http://refit.sourceforge.net/