This thing requires the 64 plugin pack (for proj. spawn moving)
1. Okay, HMT, open map, whatever, go to the ipt! (damage) tag
2. Find your plasmacannon explosion and turn the min and max damages to 0.00001 (the force is useless unless it does SOME damage, so we just make it really low)
3. Turn the force up to something like 15 or 20 (feel free to mess around with this)
4. Save and open the plasmacannon weap. tag
5. at the very bottom find the projectile spawn coordinates, we want the blast to happen behind and below MC
6. X should be around -0.6 (if you get a warning, hit ok and keep typing)
7. Z around -0.2
8. Now, to get it to EXPLODE there
9. Open the Plasmacannon Proj. tag
10. Check "detonation timer starts- immediately"
11. Set "Timer", and "Timer-to" both to 0.1
12 Save again and go test
For bonus points, open HHT, find the Plasmacannon under the weapon tag and swap out both of the mod2's (fp and regular) to the plasmacannon ammo crystal.