The main problem is that you want your customers to see in the browser
www.aaa.crmpt.com . To achieve this, they need to be always in that folder. So the only solutions are:
1. An Iframe, as Chris suggested, so that all scripts run in this iframe
2. Design a script structure that only contains a couple of files, and then it makes calls to the scripts (using the "include" or "require" command) from the folder that will hold all these scripts.
This is common procedure where you usially have only an index page in each subfolder, and the requested action is passed to the same page using the GET method . As soon as the page refreshes, it "sees" the action required, and includes the ne cessary script from the "includes" folder.