ModernBill Customization and Tweaking

I am currently using the ModernBill System on my site. I am not happy with the functionality of the ordering process. I am wanting help working on the way the system flows while a client is ordering product. 1) When someone orders a domain it is displaying the number of years desired but it also displays another drop down for monthly, quartlerly, yearly, etc. I don;t want this. 2) I sell other products and services which have nothing to do with domains or hosting - When a client orders such products they should only see the correct billing options and right now they don't. My domain ordeirng link: [login to view URL] My non-domian ordering link: [login to view URL] REQUIREMENTS: MUST HAVE AMPLE EXPERIENCE WITH MODERNBILL!!! Project Agreement Required Must be able to communicate via MSN or Yahoo I am not wanting to do anything with the design of the system. This project is for settings and functionality ONLY. Thanks, ALARIA