Thanks Zion,
I have had tried something akin to your method except instead of renaming, I tried to move/copy the resulting file after each PDF creation. I had much trouble in that I could not get the macro to wait until the PDF was fully made (believe me I tried 100 different ways; ways which should have worked; including a waiting loop which just waited forever), thus generating an error by trying to copy too soon. I suspect I will get the same with a rename command, but I'll give it a go nonetheless.
RH