Hi there.
To do what you would like to do, you need to edit the .dff file, what is the 3D file of this ped model.
Have on look on this:
http://www.youtube.com/watch?v=wezvlqwE5IIOr just search a few other tutorials.
You will need 3DSMax, those tutorials right there are great (remove those links if I'm not allowed to post them ofc) :
HOW TO EDIT YOUR 3D MODEL:
http://forum.ls-rp.com/viewtopic.php?f=223&t=149656HOW TO GET 3DS MAX (FREE 30 DAYS VERSION):
http://forum.ls-rp.com/viewtopic.php?f=223&t=183238There are a lot of tutorials on internet

Tell me if you got a problem, it's not an easy thing.