BBWin config file xml parsing API

Anybody have experience with writing extensions for BBWin?

Specifically, I need to create three-tier configuration like:

<extension>
    <foo param="param1">
       <bar baz="baz1" />
       <bar baz="baz2" />
       <bar baz="baz3" />
    </foo>
    <foo param="param2">
       <bar baz="baz4" />
       <bar baz="baz5" />
    </foo>
</extension>

I can get to the foo's but not the bar's.

It seems that GetConfigurationRange only seems to want to work one deep 
from the <extension> level... but there's a HIGH possibility that I'm 
doing something wrong. :-)

Thanks,
Jon