Personally, I never figured out the whole mapped drive thing in MCE.
Instead I use a simple script at startup to map one of my network shares and that makes all of them available for inclusion in MCE.
The inclusion of "sleep.exe" is because my NIC doesn't seem to initialise correctly immediately at startup. Sleep is available for nothing, just google it.
I think it was Imelda that gave me this script. Apologies if I'm wrong.
Code:
sleep 5
net use x: \\computername\share /user:username password
I hope this helps.
E.E.