If you have installed a partition for ME version, I would presume you are talking about a dual boot system.
You cannot view the contents of the ME partition from within XP after boot up , you need to select either / or with a boot manager ,prior to loading.
If you did not have second windows folder for sys files you would not be able to view the file contents in the second partition.
Therefore unless I understand your question totalling wrongly, make the ME partition a second "primary" not a "logical" partition and use Boot Magic as the boot manager (within Partition Magic) having chosen to hide /unhide the XP primary partition in P/M on boot up , you will then be given a choice of which system to load.