Launcher doubt

Hi, i'm a warmane member since long time ago but i decided to play some months on Naerzone server with friends, nowadays i convinced them to play here on Warmane but i have a problem.

I downloaded Naerzone's game client with Legion models and their own launcher, now i cannot connect into warmane, i have changed the realmlist but i need the warmane's launcher to play.

The question i have is: can i play using that game client? I wouldn't like to download a new game client again.

Could you help me?