Access to SCP portal source code

I have one site called "Customer_Portal" in SCP portal service. This site was create using a parallax template, then i want to access to souce code to do a change, but I dont know how to do it? I know that i can use a SAP Web IDE, but I only found a template source code and not found the "Customer_Portal" source code. In summary mi question is, how can i access to portal site source code?

Thank in advanced