If you can put a card in your computer on your own at home, and you have an iq level of the average house plant or above, then you should be able to make your own setup, without resorting to purchasing plans. Visit the subdomains on mp3car.com and the links off of those subdomains for a few days, with a pad of paper to jot info down and write your ideas/questions as they come up, and you should be able to formulate an effective plan of your own in producing your very own Mp3Car.
Purchasing plans are NOT necessary. All the info is available on the public domain. All you are really doing is lining the pockets of people who don't know how to use their spell-checker in Microsoft Office, if one set of plans that i have seen are any indication.