php and smarty template coding

Need to add php to our order system that uses smarty templates that: 1. Shows affiliate code depending on product ordered. All the info is there just need the php to do what's needed. Should be fairly simple. 2. Adds users that order to various mailing lists. All one system just different lists depending on what they ordered and if they already paid or are sending a check etc. I also need a script to help manage my lists using data in our billing system. 1. When a client orders but doesn't pay with a credit card they will be added to a mailing list that basically sends payment reminders. But I need a system to keep checking in the billing system to see if they have paid. If so they need to be removed from that list and added to the new client list or if they are marked canceled just remove them. 2. Need to add all current active clients to our news list. This will only be done once. There is a check box in the billing system for newsletter. If a client unchecks that they need to be removed from the newsletter list. If they remove themselves from the list itself then the check box needs to get unchecked in billing. ## Deliverables I'm looking for a good programmer that will test their work well.