firstly need integration of the [url removed, login to view] payment gateway to redirect to there secure pages for payment.
secondly i sell xbox live codes which are 25 digit pre-paid codes would require a set up that would automatically send the code via email upon succesful payment instantly. would be needed to allow input of 5/6 different code types ie 12/3/1 month subscription codes and 2100/4200 points codes with possibly a spare slot incase a new line of codes came out.
as mentioned above i use zen cart on my site. not got a clue on programming or script writing so the help is a necessity but budget is pretty tight.