combine 3 nfs shares in one, but only in the computer:/// view (gnome)

The question is clear and simple:
I have 3 nfs shares, but I mount them manually. As a matter of fact those shares are 3 folders on my desktop - somethimes I need them mounted on my laptop.
How can I make them look as one nfs share in computer:/// - is there a way to manipulate the icons which show up there and to execute the 3 nfs mounts just with one click?

Thank you for your posts in advance!

P.S.: I'm running FC6 and Gnome - all this is about the gnome computer:/// "folder"

[Seve]

Hello:
Does this how-to help ?
How-To: Show all your mounted partitions in the "Computer" window!

Seve

[A.Serbinski]

To make them show up as one, you share/mount their PARENT directory.

first, thanks to both of you for the fast replays, unfortunately both solutions don't apply to my problem, because
1. In the policy I can only show/hide the mounted volumes in computer:/// . I need to manipulate the already visible volumes. If this is possible, it will be in another .xml file, I suppose...
2. I need to mount only
desktop:/home/user1 -----> to /media/desktop/user1
desktop:/home/user2 -----> to /media/desktop/user2
desktop:/media/volume2 -> to /media/desktop/volume2
as you can see, those are 3 totaly different folders. I could mount desktop:/home to /media/desktop, but then I couldn't create another folder in /media/desktop (or this will be hidden).

If there isn't some kind of ".xml-solution", another option will be the "mount -t union" filesystem but I have to update/recompile my current kernel...