Texture problem in Half Life Model Viewer

[sifly_04]

Hello guys

I' ll like to know how to load Texture for a gun like this sniper in HL model viewer :

[IMG]http://img15.hostingpics.net/pics/801918sniper.jpg[/IMG]

This is the HLMV from Half life 2. i' ll like to know how to manualy load the VMT or VTF file to this gun

Thanks a lot