Question about lowgravity

So i was thinking, isn't there a way to do this in XML.
Like you go ingame > Make a gameroom and click options so you can set them for your room. Like you can pick there: Gravity: 100%, 75 %, 50%, 25%.

Is there a way to do this? (I guess this is more fun than creating a whole DLL which does it, and this is only when you want it :P)

It would be troublesome. It would require ASM/C++ and xml coding.

Make a dll, and i may let gunz loads your dll auto^^