Steps for playing a private server :
1. Get a client
-RedCabalOnline client :

-Cabal EU client :

-Cabal US / PH ...

em'
2. Get the patch from the server you want to play
You can find every server with their rates , patches and so on
3. Install client , install patch over client ( replace files from patch )
4. Register an account for your server , login and play
You have the rates in the thread from number "2."