Lipo wiring Question

I'm just starting to look into Lipos, I've read quite a few posts but i just keep seeing numbers and letters, 3s2p and serial parallel and I'm getting really confused, not hard i know! :002:,just seems you need a degree in electronics, I'm used to just throwing a set of NiMH batts in my maxx, could anyone give me a complete beginners breakdown of what these numbers mean and a diagram of how you wire these things up, i think my mind is making it more complicated then it really is.

This is going to be a big step for me going over to Lipos so i really wonna get it straight in my head before i start thinking of buying anything.