Bah, I remember, they had to edit the Aurora Bomb otherwise it wouldn't land on the right spot.
Code:
FireOCL = OCL_DaisyCutterExplode
ProjectileDetonationFX = FX_DaisyCutterExplode
In the weapon.ini entry (replace something) and for the gas, add a lifetime update.
you may want to tweak some settings, but that should do the trick (And yes, I tested it this time :P )