1st. Goto your Game folder
2nd. Backup the file called 'TEXTURESCRIPTS.rez' file
3rd. Make a folder in your 'Game' folder called 'TEXTURESCRIPTS.rez'
4th. Now depending on what file you have to inject your ****b or .dtx in make a folder inside the folder 'TEXTURESCRIPTS.rez' corresponding to the .rez file you want to inject it into. E.g. If you want to inject PVLMA_M16A3****b into GUNS_M_PV_AR.rez your new folder would be called "GUNS_M_PV_AR" (remember to not include '.rez')
5th. Just place all your .dtx or ****b files in the folder corresponding to the .rez file you have to inject into!
6th. Click Thanks!