technically, I believe you CAN scale it in SP, but I dont think you can in MP, because, once again, you must have the JA skeleton fit the model, however I do believe it can be done in one of the game mods.
I did meant JA-... Anyway, If you alter the modelscale.cfg in your japlus directory, you can scale models on mp. For sp you will have to build a bot and npc file to do the work.
Out of curiosity... Could he not weight it so that it appears larger? I mean attach it to the bones so that it at least it is a little more bulky. Again forgive me ,im not a modeler just curious.
no, because, for example. the saber bolt is positioned on the right hands bone. so if the model was scaled bigger and rigged, you would more than likely have the saber floating somewhere in thin air =/ best thing to do is simply model him out of all reasonable proportions, and see what happens.