Well well well...it's pretty nice to have a great menu system like this but...what about button function ??? Ok, let's see how to set an URL for each rub and/or subrubs...
Like others constants, we'll input each URL wanted for each rub and/or sub rub. If you don't input any constant for a rub or subrub ??? We'll see this part too.
Ok, like you've understood, open your constant keyframe (do I need to write witch one...? the first one...) and constants like that (in corresponding part for better edition) :

Set Variable: "URL_Rub1" = "http://www.montfort-sa.fr"
This is syntax for rubs, do this for all rub you want URL
Probably no URL if there are subrubs for this :-)
Set Variable: "URL_Rub2" = "http://www.adresse2.com"
Set Variable: "URL_Rub3" = "http://www.adresse3.com"
etc.
now the syntax for URL for subrubs :
Set Variable: "URL_Rub1_Subrub1" = "http://www.montfort-sa.fr"
Set Variable: "URL_Rub1_Subrub2" = "http://www.montfort-sa.fr"
etc...

Right now, always in the first keyframe you've note that we dupplicated our rubs (subrubs are dupplicated or remove in second one). So under the line that send the right label to each rubs, we'll insert the URL line :

...
 Set Property (n, Y Position) = YPosition
 Set Variable: n&":Label" = eval ("LabelRub"&n)
	Set Variable: n&":URL" = eval ("URL_Rub"&n)
End Loop
...

For the subrubs now, so in second keyframe :

...
 Set Property (TargetRub&"_"&z, Y Position) = YPosition
 Set Variable: TargetRub&"_"&z&":Label" = eval ("LabelRub"&n&"_Subrub"&z)
Set Variable: TargetRub&"_"&z&":URL" = eval ("URL_Rub"&TargetRub&"_Subrub"&z)
End Loop
...

On (Release)
 Get URL (URL)
End On