[RegCNET] Running RegCM3 nested

[Marc Pace Marcella]

I am looking to complete a nested run of RegCM3.  I havent seen much out there
on how this is done.  I'm getting the following prompt when I compile
terrain.x:

You are preparing the NEST run
Please input the original size of ARRAYs
JX_0, IY_0, KZ_0
You need cut 2 rows for both JX_0 and IY_0

Is this where I specify my larger, coarser domain?  If not, how do i specify my
coarser outter domain and my finer inside domain? (Im assuming somewhere in
domain.param)  Would anyone that has had success with running a nested version
of the model be able to help me out at all?  I would really appreciate it. 
Thanks for any input.

-Marc