I require mcd to mount multi partition usb in the following way.

If usb has 3 partitions,

Partition1
/fs/usb0/Folder A
/fs/usb0/Folder B
/fs/usb0/Folder C

Folder A,B,C indicates the three partitions present.

What I have done so far in mcd.mnt is 
/dev/umass[0-9]t1[124]			/fs/usb%#/Folder%0	dos		normv,fsi=use
/dev/umass[0-9]t1[124].[0-9]	/fs/usb%#/Folder%0	dos		normv,fsi=use
/dev/umass[0-9]t[146]			/fs/usb%#/Folder%0	dos		normv,fsi=use
/dev/umass[0-9]t[146].[0-9]		/fs/usb%#/Folder%0	dos		normv,fsi=use

But this creates partitions as Folder1, Folder2 etc. So is there any way to change it to Folder A instead of number?