Alexander if this helps you any, if you copy the report as a temporary file maybe sys(2015) open it up as a table and change the printer information in the EXPR field. The DEFAULTSOURCE=7 statement below tells what tray the report will print to. I hope it works for you.

DRIVER=WINSPOOL
DEVICE=DEVICEMAIN
OUTPUT=\\PRINTERSERV\PRINTER1
ORIENTATION=0
PAPERSIZE=1
PAPERLENGTH=2794
PAPERWIDTH=2159
COPIES=1
DEFAULTSOURCE=7
PRINTQUALITY=600
YRESOLUTION=600
TTOPTION=2
COLLATE=0