I am successfully using (Windows) junction points to span several hard drives from a single share.
First, create a small partition that will contain all the junction points (pointers to the real folder locations on other partitions. The junction points can be to any hard drive on the same computer (not USB though).
Second, create the junction points in the small partition with NTFS Link. This is drag and drop in Windows Explorer after installing NTFS Link. (Junction Link Magic and Winbolic Link also work)
Third, make all partitions shared and check "allow network users to change my files" if Mplay is to store resume points, bookmarks, and aspect ratio (zoom).
Fourth, you may want to edit Mplay.roku to start in the directory with the junction points.
Fifth, Roku needs to connect with the one share with the junction points.
Note, if you are using the Roku web interface, you need to also make a share pointing the partition with the RokuWeb folder. Two shares. That's it for as many hard drives and partitions as you would like.
I would like to thank everyone for continuing to make the programs utilities, and codecs available.
Several Photobridges (with external power supplies), Samsung 71" DLP, Vizio 42" LCD, widescreen LCD monitors, 1G wired network