Rifle firing speed is increased, damage is decreased, accuracy is slightly decreased, clip size increased to 30.
Laser pistol damage is slightly decreased.
Laser Rifle ROF - 5 rounds/s
Plasma Rifle ROF - 3.5 rounds/s
(also there's a little gift in the middle of the Citadel)
Download here:
http://www.fallout3nexus.com/downloads/file.php?id=13444