Ok. if u want to use these mods u have to do following:
Download them and extract.
Then open a folder and extract again.
Now rename what mod u want to: PV_L96A1.DTX
Rezinject it into GUNS_T_PV_SR.rez
Then move the old GUNS_T_PV_SR.rez and move it to ur desktop or somewhere, where u can find it.
Then find new what is called: GUNS_T_PV_SR.rezNEW and take NEW out.
When it ask something, click yes.
Enjoy and thank me if i helped u. (:
EDIT: PLUS +, if u dont know what to rename use ur math skill.
them are named like 1.dtx, 2.dtx, etc.
so if u want first one, rename 1.dtx to "PV_L96A1.DTX"
if its second, rename 2.dtx to PV_L96A1.DTX etc.