What exactly do you want to know about mapping Melv?
Im happy to help but dont wanna start harping on about some bollox and send you to sleep cos you didnt wanna know it :'(
I can even do pictures.. just ask me an actual question.
EG:
What does a chip look like when you extrtact it from the eprom onto the pc?
How do you know what part of that load of garbage is a map?
What equiptment do ya use for monitoring fuel?
Etc Etc Etc..
I need to be led otherwise il be off on a tangent