[plt-scheme] Canonical install procedure for PLT Scheme on Mac OS X 10.4.11?

Hi,

I'm a newbie to Scheme in general, and to PLT Scheme in particular.  I'm trying to install DrScheme/MzShcheme, and I 
just want to make sure I'm doing it right.

Here's the procedure I've followed so far:

* Go to this site:

http://download.plt-scheme.org/drscheme/

* Select "Macintosh OS X (PPC)" from the "Platform" pulldown menu.  Click Download. This will download a .dmg file to 
your desktop.

* Double click on the plt-372-bin-ppc-osx-mac.dmg file

* With the mouse, copy the folder "PLT Scheme v372 file" to the Applications folder

* From the command line, change the name of the folder from "PLT Scheme v372" to "PLT_Scheme_v372" (I hate spaces in 
directory/file names)

* Add the bin directory to my path:

PATH=$PATH:/Applications/PLT_Scheme_v372/bin

This works, in that it enables the mzscheme interpreter to be found on the command line.  However, it seems like the 
files in the bin directory should be installed in a more common location, such as /usr/local/bin.

What's the proper install procedure?  Am I putting things in the correct location?

Thanks for any assistance you may wish to provide.

Chris