Viewing PDFs in Netscape 7 on Mac OS X

Hi All,
I've recently installed Netscape 7 on a Mac with OS X and then installed
Adobe Acrobat Reader. When I navigate to sites that display PDF documents
Netscape doesn't seem to be able to find the plug-in to display them;
instead it prompts me to save or associate an application to open the item.

I used both the Help -> About Plug-ins and Netscape's Plug-in Manager to
check if the Adobe Acrobat plug-in was installed; neither seemed to be able
to find it. The only instructions I've found for dealing with this plug-in
problem on a Mac, deals with Netscape 4. I'm new to the Mac and I wasn't
able to find the Netscape 7 Plugins directory (even through searching).

Can anyone offer a solution or point me in the right direction. I really
need to be able to view PDFs in the browser and Netscape 7 is a must.

Thanks in advance
Michael