Browsing through different posts, I came to the answer:

1 - First, check the file:
/etc/hildon-desktop/status-menu.plugins
If the applet you want to move/reposition IS NOT listed in there, then, step 2.

2 - Go to the folder:
/usr/share/applications/hildon-status-menu.
There, you'll see all the installed applets, and take note of the name of the applet you want to move/reposition.

3 - Once you got the name, just edit the file /etc/hildon-desktop/status-menu.plugins like this (thanks to b0unc3 for the info):

[NAME_OF_THE_APPLET_HERE]
X-Desktop-File=/usr/share/applications/hildon-status-menu/NAME_OF_THE_APPLET_HERE
X-Status-Menu-Position= X

where in NAME_OF_THE_APPLET_HERE you obviously put the name (for example quick-launch-sb.desktop) , and in X you put a number that will represent the postion into the status menu.

Enjoy .

PD: remember to back-up, just in case (Y)