Adobe Media Server and Multiple Storage Drives

We are running Adobe Media Server 5.  We have had one disk location for all media files up until now, but we are outgrowing our storage and need to begin having multiple volumes. 

We need a way to specify that some files live on another drive.  We are at a college, and we want to have all of our nursing video on one volume by itself to free up disk space.

for example, we have always had everything in http:\\domain\vod\nursing or http:\\domain\vod\username.  We need to move http:\\domain\vod\nursing to e:\webroot\vod\nursing, but have everything else continue to work.  It's on the same server. 

We have been on the phone for hours with Adobe support and have gotten nowhere. 

We have tried adding a new application with the virtual directory set to e:\webroot\vod\nursing,

declaring variables in ams.ini, changing the httpd.conf file, etc.  We have not had any luck. 

Everything always points back to this document: 

http://help.adobe.com/en_US/flashmediaserver/configadmin/WS5b3ccc516d4fbf351e63e3d119f2925e64-7fc7.html#WS5b3ccc516d4fbf351e63e3d119f2926bcf-7fea

We haven't had any luck with following those directions, and adobe support essentially told us they had never heard of this use case? 

Any advice would be helpful. 

Thanks!

Joni