OK, I did it and it worked fine first time. I suppose I'll write up a Vista FAQ, but it done the exact same way as before.
On the PC, open MDC:
Ensure the PPC already has a partnership
In Mobile Device Settings, click Connection Settings
make sure Allow Connection to one of the following: has BT selected
On the PC, Open BT device control panel:
create new incoming serial port
then allow discovery
on PPC, Open BT control panel
find new BT devices
find the PC, setup secure connection
In the partnership settings, select services, you should see ActiveSync, check it and Save.
That is it...
BTW, I found a tutorial to change the icon in the MDC main window.
not a hard thing to do.
find the ico file for the model you wish to have displayed.
rename it sync.ico
Put the sync.ico on the PPC windows folder
Go to the PC device manager and remove the mobile device (if it is already configured)
undock if curently docked
then dock... it should copy the ico from the PPC to the PC and display it in the screen
Link to details and lots of ico files:
Vista - Windows Mobile Device Center - Picture - Icon Hack - PDAPhoneHome.com