PostScript Trick.

Here's a trick to print or combine two or four page PostScript
file into a single page...

localhost> psnup -n 2 test1.ps >test.ps

The above will take a multi-page PostScript file and combine 
two PostScript pages onto the same page...

localhost> psnup -n 4 test1.ps >test.ps

This one will combine four pages onto the same page.

Look at the man pages for psnup for more information.