Choose your operating system and download and install. Next extract both winrar files using winrar to where ever you want. (Preferably your Desktop)
Now locate the PerX injector and right click and then click PROPERTIES.
Click on the COMPATIBILITY TAB and then click RUN THIS PROGRAM IN COMPATIBILITY MODE FOR: WINDOWS XP
Example is attached: Perx Injecter.jpg
Also at the bottom click RUN AS ADMINISTER
Now click apply changes then OK
Now double click PerX injector and it will ask you to open as an administrator. Click OK
Now where it say WHAT TO INJECT: Type in ENGINE
And then browse the recently downloaded 1.05.dll file. (AKA the Public V.1.05
Example is attached: Perx Injector 2.jpg
Now open Combat Arms and it will automatically inject and everything should be good.
To know if the hack worked it will say: LONGEVITY PUBLIC V.1.05 near the top left of your screen
Insert is for the menu and left and right is to activate hacks on and off