For everyone that is interested in knowing how I figured it out:
I started work in single player, because to test results I actually needed a Banshee. I used Silent Cartographer. I put some Banshees in there, and went through the vehicle metadata swapping the mode, antr, coll model, everything, for the ghosts. I had to narrow down where the "fly code" was. When I found it was in the vehicle, or was pretty sure anyways, I tried injecting the Banshee vehicle into BG. This didn't work for some reason (still not sure how I screwed that up), so then I went back to single player. I put ghosts into the level instead of Banshees, and slowly replaced bits of the Banshee vehicle Metadata into the Ghost vehicle metadata until I found the tags that made it fly. After I had them, I did some more work to figure out exactly what each one is. That's how I got the hover no hover. There are still some cool things to be done with it if anyone is interested in playing with the "fly code" some more.
I have since tried injecting that code into MC bipd metadata, but he can't move, although he does float. I can't seem to find where his thrust goes, if he even has it. The format for biped metadata is different from vehicle metadata for obvious reasons. Again, if someone wants to try to get MC to fly, that would be very cool. Also, please remove the full HUD and his collision model so we can have a "camera man." hehe, that would be nice.