The Wowza Pro server does not support ActionScript on the server side (main.asc). So yes, you would need to recode this functionality in Java using the Wowza Pro server side API. The API is documented (document Server Side API Guide and FMS to Wowza Pro API Mapping) and the Creating a Custom Module chapter in the User’s Guide walks through the process of creating a Java project in Eclipse. I suggest you walk through this example and give it a go. Just ask lots of questions on the forums and we will jump in and help.
Sry, what i was getting at was that with FMS the server will look for main.asc in the application folder (then if that doesn’t exist it will try several other variations) that will be run first when the application is started. With more investigation i think i found my answer with the configuration of the Applications.xml to load a custom module. Thanks for the prompt reply!