I'm looking at visiting Penang and Kuala Lumpur. CX's flights to PEN are at a time that doesn't suit, but their flights to KUL do. Therefore I was going to buy a separate ticket and transfer to MH for a return flight to PEN (for peanuts).

I can't seem to get much information on transfering to a domestic flight at KUL. Has anyone done this before? How much time should I allow from landing on CX to boarding with MH domestic?