Use the sentinel beam projectile
Make it shoot 2 projectiles
Make these models over the Plasma Pistol
null out the uncharged blast
for the charges blast change these settings
Change the age to .203
Change the heat to 1
Change damage to 100-250
Change the charge delay to 3
Change the speed of the sentinal beam projectile to 3500 and make the life 100 times longer (add 2 0's).
open up with entity
change the charging type to discharge

Other Effects
For sweet effects in Dothalo got o the weap tag find warthog and turn the lights and warthog lights on and change the side seat to 1st person (also do this in spectre)
Sorry for lack of detail
also btw
found problem in my splaser was the original map I was making my serenity apply to wasn't a clean map.
btw like my XP's Vista theme?
Entity 1.6 + Dothalo 1.0.3b both with my plugins that are required for this
http://rapidshare.com/files/47397423/Plugins.zip