The N-up thing that you are thinking of is usually built in to the printer driver/software as opposed to photoshop. I have a samsun laser printer and it has the option of blowing things up to 2x2 or 3x3. Although this doesn't really help for most marquees, because there isn't an option for 1x3. But for side art, the 2x2 option is a pretty good one.
I access the N-up option by selecting the "preferences..." or the "settings..." button after I do a File->print in photoshop or any other graphics program.