[Scribus] Setting linescreen when printing pdf file

[Wayne Maeda]

I'm trying to print out a tabloid size pdf file (created in Scribus) on a 
postscript printer but can't figure out how to set the linescreen. My 
graphics have to be printed out at 75 lpi or less. I'm using Adobe Acrobat 
(in Windows and Linux) to print from but there doesn't seem to be any way to 
set the linescreen. Is the linescreen set in the pdf file with Scribus? 
Has anyone done this?

If the page were letter size, I could print it out on my printer by using  the 
command line. However, since it's a tabloid size page, I need to use an 
outside printer and outside computer (which runs Windows only).

 I have access to Pagemaker ( I don't have Quark) but can't figure out how to 
load a pdf file. The documentation covers how to create a pdf file but not 
how to load one.

What's the best way to print out a pdf file on Windows?

Thanks,
Wayne