HL1 Egon gun rigged on HL2 hands

So my friend is making a mod called HL2 Episode 2 enhanced ( http://www.moddb.com/mods/hl2-ep2-enhased-mod ). He has added new weapons and the egon gun is one of them. But the problem is, its not rigged on HL2 hands. So what im asking: Can someone rig the egon gun from http://gamebanana.com/hls/skins/15204 with the hi res textures of http://gamebanana.com/hls/skins/89408 on HL2 arms. He also said something about adding muzzlebone to it, not sure what it is myself but if you know can you do it? Contact him at http://www.moddb.com/members/gunship-mk-ii or http://steamcommunity.com/id/gunship_mk_ii .