So i was mucking about with movement flags and found the Swimming Flag, the result is the ability to fly around the map, noclip style without the ability to go through walls.
At present, i have to patch a couple of conditional jumps for this to work, otherwise the movement flags are sent to the server. But for an easier method of doing this, set your movement flags up and spoof the flags sent in the movement packets!
[yt]scT0S57BCwY[/yt]