[kronolith] Syncing shared calendars possible?

[Sjoerd]

I'm trying to figure out if and how i can get a shared calendar from  
someone else to sync (via syncml or activesync) with my mobile device.
I'm not too much of a prograammer, but looking at the prefs.php in the  
kronolith config dir i thought that something like (adding the extra  
line with shared in it):

// Calendars use for synchronization
$_prefs['sync_calendars'] = array(
     'value' => 'a:0:{}',
     'type' => 'multienum',
     'shared' => true,
     'desc' => _("Select the calendars that should be used for  
synchronization with external devices:"),
);

might do the trick, but apparently not, cause I'm not able to select a  
shared calendar in the sync options, so.... is it possible in the  
first place? If so can someone push me in the right direction (or give  
the solution ;-) )

Thanks in advance

Cheers,
Sjoerd