How to use unkn0wn's texture installer:
http://unkn0wn3d.tk/csgo-texture-installer/?p=doc

Basically, you choose v_rif_m4a1.vtf with "Select file" in the program. Then you type "v_rif_m4a1" in the "replaces" box and choose the one that say:

models\weapons\v_models\rif_m4a1\v_rif_m4a1.vtf

Then you simply press install.

When installing w_rif_m4a1.vtf, type "w_rif_m4a1" in the "replaces" box to find it. The one you should replace is obviously:

models\weapons\w_models\rif_m4a1\w_rif_m4a1.vtf

Have fun!
