Here is the hacked DLL :
www.amousehole.com/engine.zip just unzip it into your ut2k3/system folder. You need to have applied the lastest demo patch and you should backup your existing engine.dll... just in case.
To summon the buggy:
Go into ghost mode and fly up a bit
Type "summon vehicles.bulldog"
Type "walk" and walk up to the buggy
"u" is the USE key
It's kinda hard to control and gets stuck often. Hopefully it will be improved for the final version. Oh yeah, left click to fire rockets and use your jump key to get out of it.
To use the ion cannon
Go into ghost mode and fly pretty high to place the satellite.
Type "summon xweapons.ioncannon" to place the satellite.
Type suicide.
Type loaded and choose the ION cannon laser painter(just before the deemer)
Now paint the ground and don't move. After a couple seconds it will light up and BOOM!
BTW for the laser to work, the target has to be in direct line of sight to the satellite.