Would it be possible to add the device  
"pseudo-device gre"  to the kernel for wccp redirection ? 

   1605R -- switch -- internal_net 
  ( squid box is on internal_net )

I am currently using a Cisco 1605R using wccp to a linux box running squid. 
This works great but I would prefer to use m0n0wall to do this. 

Outside of me installing and setting a m0n0wall dev box, 
are there any incompatabilities with the current m0n0wall 
config that would not allow this to work ?