Hi Everyone,
Honestly, I never anticipated all that, and realized in time, I was about to get skinned for the project :).
Anyway, I'd first (as suggested) prepare a list of what is to be done (by studying the existing system) and then decide if I am doing the project or not. It might be easy if the company provides the source code (but I seriously doubt it).

By the way, is it possible to lock the security bits (if any) in EEPROM chips?( i mean do they contain security bits?)

Warm Regards,
Harsha.