Oh well.
1. Open the injector (as Administer)
2. Open Raiderz Launcher
3. Start game
4. MAKE SURE IT'S FULLSCREEN OR THE GAME WILL CRASH
5. Go to a spot where no one can see you
6. type /die
7. now press F9 (if you can't see your char press H and see if the weapons changes)
8. When you're about to respawn, stop the switching by pressing F9
9. Wait to fatigue is off, and Bam! Try hitting a monster and you'll see.
Notice that how longer you let the hack run, that higher will you DPS be.
Notice that you have to equip the other weapon at slot 2!