On my hp laser printer (admittedly quite a bit newer than your 8500),
there are 2 categories on the Device Settings tab: "Form To Tray
Assignment" and "Installable Options." The first one (for my printer)
shows Tray 2 as "Not Available" (not surprising, because I don't have a
second tray). Under "Installable Options," however, the "Not Installed"
setting for Tray 2 is changeable to "Installed" via a drop-down menu.
If you have something similar for Tray 4 on your 8500, try setting it to
"Installed" under "Installable Options." If you don't have anything
like this, perhaps the capability to use Tray 4 is missing from the
WinXP driver.
This is an old and discontinued product for which HP never supplied a
Windows XP driver. There is a driver for the HP8500 supplied with WinXP
(HP calls this an "in-box" driver, meaning that it comes "in the box"
with Windows XP). However, says HP, "Although HP worked to provide
comparable functionality with the Windows XP drivers, some features may
not be available via the in-box driver."
HP also claims that updated drivers for 8500 series printers will be
available from Windows Update, although generally that's not a good
place to get drivers from.
See generally
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=bpl11035
Or you could search and/or ask for info in the hp forum:
http://tinyurl.com/3bdfeb
--
Lem -- MS-MVP - Networking
To the moon and back with 2K words of RAM and 36K words of ROM.
http://en.wikipedia.org/wiki/Apollo_Guidance_Computer
http://history.nasa.gov/afj/compessay.htm