The best way that I have found to deal with Prodigy IF you are using System Builder is to not use composer. Build the project without composer and add your own Logic instead of letting SYstem Builder generate the logic. Doing it this way you create all the macros yourself.
If you are using Composer try and figure out how the Two Zone Volume Extender works. It is basically an Interlock like in Simpl. For example, when you select a source(DVD), you could then go to programming view look under Two Zone Volume Extender and under Events look for something like: ON Source DVD Selected FB. Enter your Macro there.