Pay Cycle Manager - Output Type File - Unique Filename FSCM 9.0 - PT 8.50

Does anyone have any experience with a customization to make the output files (check, advice, or file copy) from Pay Cycle Manager processing unique?

We'd like to default a shared network location for all AP users to print advices and file copies, but we need to prevent overwriting the files without requiring users to copy/past/rename the files for every single instance.  I've added logic to the &FILENAME creation within the FinishRequest() method of the PayCycle App Class, using the %%INSTANCE%% meta string and it is working fine to ensure that all files are unique by including the process instance number in the filename.