Batch Printing

Okay, the "Image to PDF" option I attempted wasn't working as well as I hoped, so I've been wondering about other ways to get my files printed and then it occurred to me, batch printing.

I'm looking for a free batch printing program that enables me to install it on a USB memory stick. I ask for such a bizarre criteria, because the hassle of installing it on the computers here at work is too much (I am not allowed to install anything and being a temporary employee with not much time left, I doubt the IT department will accept my request).

So, to summarise:

batch printing program
must be freeware
must be functionable on a USB memory stick.

Thank you in advance for any help provided.