Directory Walker question

[Barry Levine]

In a number of earlier digests, there was discussion about the 
"directory walker". I've copied that code into my script and, sure 
enough, it works exactly as advertised. However, in OSX, it also walks 
down through app bundles. I'd like to stop before diving into the 
bundle. However, I need to get the total size of the bundle (both data 
and resource) for later purposes. I've played with the "detailed files" 
function and it looks like I may have to use it to add up everything 
inside the bundle. I don't mind doing that (as Rev is really quite 
fast).

Near as I can tell, I'd have to use the "detailed files" function after 
using the directory walker in order to add up the bytes of both forks 
of all the files, and then run a modified version of the directory 
walker routine which would permit me to recognize app bundles and end 
up with a list that's similar to what the user sees in the Finder. 
(Alternatively, once I have the detailed files of the entire tree, 
could I parse through it and eliminate what I don't need?)

Here's what the directory walker sees (I've removed the enclosing 
folders to make it readable in this eMail):

Adobe ImageReady 7.0/Adobe ImageReady 7.0,0,949
Adobe ImageReady 7.0/Contents/Info.plist,14148,0
Adobe ImageReady 7.0/Contents/MacOS/ACECarbonLib,526041,518
Adobe ImageReady 7.0/Contents/MacOS/ADM-PNG,46781,2989
Adobe ImageReady 7.0/Contents/MacOS/ADMCarbon Plugin,882650,71737
(and lots more lines listing the stuff inside the ImageReady app)

So the big question is: How do I get the directory walker to recognize 
that it's encountered an OSX app bundle (ImageReady 7.0, in this case) 
and have it -not- examine what's inside. In the above example, it's 
already dropped inside the ImageReady bundle. Using the above example, 
what I'd like to end up with is simply "Adobe ImageReady 7.0" as the 
only line.

Thanks for any suggestions,
Barry