Add Content by Label Macro with Power Scripts

[Cassidy Dreyfus]

I have written a few (very) small scripts to generate labels from page contents, and now I would like to use one of those procedurally generated labels in a content by label macro to show related pages, but I have not found a way to add macros from the script. 

Does anyone know how to do create a macro from Power Scripts or pass an argument to a macro from power scripts?

Thanks