Requesting an advanced two player script.

I need an advanced two player script. I want both players to be able to create their own character, as in they choose a class and then how he will look like. (I can do that for one player), I also want both players to have separate inventories, and be able to gain exp and grow in levels etc. Also, if it is possible I would like a feature where the characters are saved so that each session the players can choose one of their old created characters and continue playing with them. I want this to be combatible with custom menu and custom battle systems. ATM I'm relying on Vlad's ABT untill something more  advanced comes along.