Hi Bob
The title of that post is A simple Tutorial--Gmax to Trains
I got to thinking a little more about your question. The link
above is to my tutorial is the process I used to get an asset just created from Gmax into TRS2009 or TRS2006. There are some parts of that tutorial that would definitely help you but even that tutorial would be more than what you need to do. I'm not sure TRS2004 as it (in my understanding) does not have a content manager in it.( I might be wrong I haven't done anything with TRS2004.) But with 2006 you Use your CMP to locate your assets. Right click on each one of them and click save as CDP from the drop down menue. You take the all the cdp's that you've created and put them all in a folder that you know what the location of it is. Close 2006 Cmp and open Cmp2 in TRS2009. Go to file/import/and location of your cdp files/ and press enter on your keyboard and CMP2 will go to that folder and automatically install each and every asset that you made into a CDP into TRS2009. The key to TRS 2004 content I think is to figure out how to get those assets in CDP format.