I have CGSovereign installed but i dont like the photon torpedoes how can i change the this torpedo to look and sound like another torpedo e.g. Galaxy or akira? and i can it be done with BC mod packager?
No, mod packager won't do it. To change the torpedo from one type to another, you'll have to either edit the hardpoint manually or use MPE to do it. To actually edit the torpedo, you'll need to look at the torpedo editting tutorial.
Torpedo editting tutorial: http://www.bcfiles.com/file.stuff?body=torp_tut
Model Property Editor tutorial: http://www.bcfiles.com/file.stuff?body=TutorialsMPE