Wireless router question.

[geer at world.std.com (Dan Geer)]

What I want to do follows.  If you have advice to share
on-list or off-, thanks in advance.  


cable modem
   |
   v
wired network, trusted
   |
   v
150' lateral, 2 oblique exterior walls, 1 oblique interior wall
   |
   v
wired network, untrusted
   |
   v
250' lateral 25' verticle, trees, 2 oblique exterior walls, metal roof
   |
   v
wired network, untrusted


Entirely Macintosh environment.

--dan