You can just get a Apple Mini-DVI to DVI Adapter for about 5 bucks on ebay.
With the update to OSX Mavericks you can run native dual screen - MBP and 30" Display side by side.
Don't you still require this:
I doubt that Mavericks can change the electrical configuration of a port.
As long as the Cinema display has a DVI or HDMI port you are fine.
MBP needs to be connected to a power source to do so, can run it on battery.
I have the same setup just fyi....