Why do you need 4 copies to share load?  You do not provide enough information for this case - and yet you are very persistent.  The webserver is designed to chare load - no need to split directories - this does not help  - in fact is worse, since the files can be cached on hardware devices and IIS.

 

Do you need separate looks for the editor?

Are you making each editor have different access?

 

Please elaborate - as you are probably going about it wrong if you are making 4 copies.  If it is to have different access - as to allow certain people to access different folders - then you should hold this stated info on the server or a cookie.

 

regards,

Dave