As I read your response, you are saying that PSE can't find the Organizer unless it is actually on that one drive location.
So, it would be a setting in PSE somewhere.
Maybe you should ask your question a bit differently:
"How can I set a new storage location for Organizer so that PSE will see it and use that different location?" or something like that...
If the setting for a different Organizer location is not obvious to you (I don't have PSE), then you would need to post with that different question on a site that is more likely to have PSE users (and more traffic
) - maybe MacRumors forums.
Why not just put Organizer on the drive where PSE expects it? Were you running out of space on that drive?
Maybe try a different drive, renamed to exactly the same name. Obviously, leave your OTHER drive with the same name disconnected.