Printing a certificate or results

I would like to allow users to print a certificate of completion. I've tried various workarounds, but since my users are small businesses throughout the state, it's very hard to test if printing is working. 

I've found some javascript that works okay to automatically open the print dialog box, but it prints the whole slide, warping the certificate and looks kinda unprofessional. 

I'd like to use the AS2's results, but that prints all the questions with answers (and I'd prefer such an easy cheat sheet to not be floating around). Additionally to use this I'd need to add in some required text. 

Any suggestions? What am I missing?

Thanks,

Jena