[OS X Emacs] aquamacs 1.9 and skim

[Gideon Simpson]

I'm new to using aquamacs, and while browsing the FAQ, I noticed a  
comment about using skim to get automatic synchronization between  
aquamacs latex and the pdf.  I have since downloaded and installed  
skim (1.3.2), but I don't quite understand how to integrate it into  
aquamacs.  Every time view the pdf output, it just opens the file with  
my default pdf viewer (acrobat).  Must I change the default pdf viewer  
system wide for it to use skim instead?

-gideon