Where are settings kept for Gadget's autostart.

Dears,

I've placed Gadget folder to C:\Program Files\Windows Sidebar\Gadgets and it appeared in Gadgets list.

Could you please advise where is located registry key/option for Gadgets autorun?

I'm trying to find the way of remote gadget installation without involving user into it.

Thank you in advance.

UPD:
found settings.ini for sidebar. )

the nowtime question is:
there are different settings .ini for different usernames and there is also settings.ini in c:\program files
which one can be used to applied for all users?