Alright I'm sure you're all aware that with the latest patch Nexon made it so that you have to launch the game from the website. I think that's stupid and if you agree read on.
To bypass this go into your Nexon CA folder (ex: C:\Nexon\Combat Arms) and find the application file named "CombatArms_Direct". Make a shortcut of this, and drag it where ever you want to launch the game from. Run it and the result is the classic CA launch. Enjoy.
Note: I know this works for CA NA on Vista 32 bit I cannot guarantee it to work with any other version of the game or Windows.