Customization of a script

I want to start a deal aggregator site and coupon site in one, however using the deal aggregator as the main site. Deal aggregator sites pulls local deals (eg New York city) from different deal sites and have them accessible to shoppers in one place. Here is what I want to do: Whenever a person go to the site a popup subscription box comes up automatically, thats the first thing they see, however this box is for the deal aggregator and is attach to that script database. I want to be able to add the coupon section to this, meaning allowing users to subscribe to both the local deals from the deal aggregator and for coupons (coupon site will use a different script so it will actually be two different sites, I however don't want users to know this as much as possible) When they end up on the subscription page want them to have these options: coupons only local deal only coupons and local deals then since its two different sites, if the person subscribe to coupons then the person will automatically be subscribe to the coupon site only. in other words information will go to individual databases and each script takes care of it, if they choose to receive both local deals and coupon script then each day the deal aggregator script will send them deals and the other script will do likewise with coupons. I am thinking of using one of two scripts, here are demos of them (I am in planning stage right now so hasn't bought the scripts as yet or started my buiness venture, proper planning first has to be done) [login to view URL] [login to view URL] (this script is open source not sure about the other one) if you notice when you access the site you are taken to the supscription box, thats what I need to work on The coupon script I will be using is either [login to view URL] which is open source script or [login to view URL] script My budget is very small. The other side of the project is to build ONE header for both script. The coupon side of the site will use a sub-domain (i'll take care of that part)