ACH CTX Format - How To

We need to start sending our payments to the bank through ACH in using the CTX format.  I have the format that the bank expects.  I've reviewed document 2195563.2 but some of the modules referenced in the document don't open in our 9.2 environment. 

I'm looking at making a mod to R04572T2 so that it writes to a flat file that we can send to the bank.  I can see the fields that need to be sent to that module but I'm trying to understand what normally calls that module.  I've read through a number of posts but haven't been able to get all of the pieces that I need.  there is an entry in our P0417 for P04572T2 but how does that activate R04572T2 and where does it populate the inputs to that batch module?