Help adding weapons

[Darth Stryke]

I have a quick question. I hope this is not in a sticky, but here goes: in Jedi Academy (or JO for that matter), is there a way to add a new weapon without replacing an old one (never mind the weapon selection screen or npc use) I tried adding it into the weapons.dat, items.dat, with all of the correct sounds and models and skins with the correct paths. When I load a map in game I get the error Bad weapon type in external weapon data : [my new weapons name here] I cannot find any other file in the .pk3 that deals with weapon names/types. Is there a way around this or will I have to simply replace a weapon I do not use?