Help choosing on-line transactions company

Hi all, I’m about to start building e-commerce credit/debit card processing Web Sites in a regular basis but I don’t have a clue on how to do that using PHP. I have to consider a couple of things before subscribing with VeriSign or any other company. I wonder if anyone how had implemented this before using pure PHP can give me a head start by pointing me in the right direction on which service to hire based on the next few things: 1. I use only rent-a-server services, so I don’t have physical access to the Server and I’m sure they won’t install any kind of out-of-the-box software for me, so I have to implement everything with PHP. I do have the option for SSL. 2. I live in Argentina, so I need a service that can process credit/debit cards issued not only in the USA or any other first world country but also world wide ones (Visa International, American Express International and Visa Electron cards). 3. I don’t have a Merchant Account. I just have a common Checking Account in the US, where the money would be deposited to. 4. If everything goes smooth and I start selling out Web Sites with on-line credit card processing, the system I choose must be able to handle detailed reports, so at the end of the month I know exactly how much I have to transfer to each one of my clients. Thanks for all in advanced, Cesar Aracena www.icaam.com.ar