Pretty easy. If you have the Kotor Tool, then it just takes using the 2da editor to change a few lines in the appearance.2da(if not, you can find it here: http://kotortool.starwarsknights.com/
Anyway, once you have the program open, it depends on if you have an appearance.2da in your game's override or not. If you don't, choose the game you want this change to be in, and click the Bifs->2da->2da Array, and look for appearance.2da, and double-click it. This opens the 2da editor, which the standard 2da file open.
If you have one in your override, you'll want to open the 2da editor(click the 2da button under file). Then look into your game's override folder for the appearance.2da file.
Either way, you'll want to edit the male lines(which I have to assume, since the model is a male figure). These are labeled 136-180. The columns you'll want to edit are the ModelB and TexB. Now for the lines you have to edit. I can't give you the exact lines, since they are broken up, having the Scoundrel, Scout, and Soldier for each of the heads.
Its like this:
P_MAL_A_SML_01 - (p=Player) (MAL=Male) (A=Asian) (SML=Scoundrel)
P_MAL_A_MED_01 - (p=Player) (MAL=Male) (A=Asian) (MED=Scout)
P_MAL_A_LRG_01 - (p=Player) (MAL=Male) (A=Asian) (LRG=Soldier)
So, for each of the lines, you'll want to edit the ModelB and TexB for all the male lines with either SML or LRG in the label. In those lines, you add this in place of whats already there:
*-For the game's NPC's that use this model/texture, an item file specifies the numbered texture it uses. In this case, you don't have access to the clothing files(other than the standard g_a_clothes01). So you'll want to to into ERFs->TexturePacks->SWPC_Tex_tpa->N, and find the N_Smuggler textures. Add something to the end(replacing the number), such as SML(for scoundrel), and LRG(for the Soldier).