Forcing simplex printing

[Gerald Gutierrez]

Hi all.

I'll be submitting my thesis soon. The university requires that the thesis be
printed on one side only, but (poor me) all the printers I have access to are
duplex by default.

I don't want to manually change the settings on the printer. Is there a way to
force LyX to generate postscript documents that print on one side only?

Thanks.