You need edit totaliten.bsv in HxD, for example:
change ssg82 to barret cammo.
Change number 13 of sgg82 to number 58 that is Barret cammo, only work in p2p channel.
Screenshot below have a correct region that u need edit:
if u r using supend method need scan this code on CE: 2F 02 00 00 53 53 47 38 32