If it wasn't installed with your browser, you can download it FREE, from Adobe's site. You must use version 3.0 of the Acrobat Reader Package. Then move PDFViewer into your Browser Plug-In Folder. The pdf files should open in your browser window. With Netscape you may have to set up Acrobat Reader to handle pdf files with the plug-in.
All pdf files are graphic intensive and large.
If you are having difficulty configuring your system, check with Adobe's site to get help , or email the webmaster .