custom programming for Google Analytics

It is important that you can handle all aspects of Phase [login to view URL] project is ready to start ASAP. We need custom variables programmed in Google Analytics. Can you program custom variables into Google Analytics? Can you tie in Adwords with Google Analytics? This is Phase 1 of the Project. We have two sites. ULC and [login to view URL] is what we are thinking so far in terms of Google Analytics. Any other thoughts are welcome. For ULC we want to know about shopping cart abandonment and general user behavior and usability. Set up the basic conversion funnels so that we can make sense of the Google Adwords audience behavior, as well as organic traffic, and see what promotions yield best results, as well as where the sales process gets stymied. Some basic conversion funnels put in on OOW so that we can track the adwords conversions from GA end instead of adwords end, as the code was never put in correctly. I think he may have something set up for conversions on ULC? If not I will need that too as I am about to start his shopping ads campaigns. For OOW we want to know what happens in each instance of the sign up form and if not completed where they fall off.