manual feed tray

How can I force this:

tell application "Finder"
	activate
	open document file "copy.slug.pdf" of folder "Documents" of folder "mainuser" of folder "Users" of startup disk using application file "Phaser 5500N.app" of folder "Printers" of folder "Library" of folder "mainuser" of folder "Users" of startup disk
end tell

to use my manual feed tray?