Basic 405gp question

[Smith, Gene]

I have a custom 405GPr board containing 64M ram and 4M flash with no PCI 
connector, just ethernet and ttyS0/1 to outside world. I am able to load 
and run simple ppc code to ram using a Macraigor JTAG debugger via 
insight/gdb using gnu tools provided by them.

What would it take to get linux running on this board? Any pointers or 
suggestions would be appreciated.

Thanks,
-gene