This may be a very simple app. Since it would only need to mess with the plist file. I'm not currently an Apple Developer, so I don't have access to Xcode.
If someone is willing to pick this up, I'd be very interested in it too. Otherwise, I may just have to get myself registered. Although, I have another project in mind that would probably come first if I were to get Xcode. (a nice Boot.plist/mkext builder designed for creating chameleon 2.0 based USB keys.)
This really isn't something that the chameleon team would need to work on though. All the settings are nicely exposed in the com.apple.Boot.plist file (which you should have in your /Extra directory)