Kurt,
I don't know of a way to control Tray settings within the report itself, but I'll tell you that we have two check styles - one for the real check, and one for the 'copy' that removes the signature and replaces it with "File Copy".
Then when we print checks, we simply print he first style and when the printer dialog comes up - choose the right tray.
Then we 'reprint' checks using the second style and the other tray.
it's not perfect but it does do exactly what we wanted and is only a few more clicks.
Hope that helps,
Mike