[OS X TeX] How to make aquamacs find Sweave without needing to specify location

[Christopher David Desjardins]

Hi,
When I want to use Sweave currently I need to do the following:

\usepackage{/Library/Frameworks/R.framework/Resources/share/texmf/ 
Sweave}

How can I set up aquamacs so that all I need to do is this?

\usepackage{Sweave}


Thanks!
Chris