Newbie to CNC

G'day all, I'm fairly new to CNC but time to learn. I have recently purchased a VQC20/50b machining centre to play/learn on. A couple of questions for those in the know. I would like to expand the memory on the machine. Does any one know a part no. for a module that will work on this machine without major dramas. This will probably be the first of many questions :eek::eek::eek::eek:.
Thanks in advance.

Regards Bob