That's all right. I've provided the WME info to jcl in my original request thread from a couple months back. I'm going to see is we can get some kind of new flag in WED that would function as a special kind of invisible/none. Any surface with this flag set to on will be invisible but receive the shadow. Here's that thread:

http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/769508/

I'll keep my fingers crossed.