Actually, the absolute easiest - and most efficient - way of doing this is to simply add a Send To Folder action task right before you print.
Remember: in PlanetPress Watch 5, the Send To Folder task can not only be used as an output task (as it could in previous versions), but also as an action task.
Therefore, adding this simple one-step task before you print will allow you to copy and rename the file easily.
Hope that helps.
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Technical Product Manager
I don't want to achieve immortality through my work; I want to achieve immortality through not dying - Woody Allen