silent local xpinstall

Hi,


I have got a problem with my xpcom/xul application.
onstartup i ask the user which language he/she wants to use this works 
perfectly well but i also want to ask him which components he wants to 
use and install these components into his profile on the following 
startup sequence. But I have two problems: first i trigger the install 
when the user clicks the ok button and so i'm in a loading window status 
but even if i work around this with a seperate window to select the 
components, the security questioning of the xpinstall process asks the 
user to install the software. But i don't want to bother the user with 
this question since i know on that point that the software is ok.

So my Question is: Can i tell the xpinstaller to skip his security? or 
is ther a way either in C++ or in Javascript to implement the behaviour 
of a light installer?

Any suggestions, opinions or help welcome to this topic.

lg Lukas