EDIT: You may get a Error Code, Just put all the hack shield folders back where they are suppose to be (take them back out of the Update folder). Then click game start CA should run properly. Then you would put them back in the update folder. Then log in and Kill.
Steps:
1) Click the CA Icon then don't press game start.
2) Go to Nexon folder, then combat arms, then go to HS folder
3) Go to update folder
4) Then click my computer > Go to Disk C: > Nexon > CA > HS
5) DONOT X out the update folder
6) Every thing that you dragged in to the folder drag out and put it in the HS folder.
7) Click game start
8) Login
9) Dominate.