The free Postscript and PDF print file handler mentioned recently for
handling files from PROTEL or most any other PCB or other package is
Ghostscript. It can be found at -

www.cs.wisc.edu/~ghost/aladdin/doc/New-user.htm

There is lots of covering info and versions for many operating
systems (MAC, 95, NT, OS/2, DOS .... and even source code to keep the
Linux aficionados happy.