Installing External Extension

Installing External Extension

I want to create a Chrome extension and install it as part of a larger
software install. This is on Windows XP/Vista/7 etc. I've used the method
described here and it works.
However, the extension is installed in a disabled state. The user has to
explicitly enable it from the Chrome menu (the user has 3 chances to do
that before the menu badge disappears) or from the extensions page.
Enabling the extension brings up a prompt in which Chrome informs the user
of the permissions the extension is requesting and asks the user to reject
or accept the extension.
I understand that Google wants to ensure that users have a chance to
reject external extensions. I also understand that Google prefers installs
via its Web Store (for various logistical reasons, that is not a preferred
option for this app). In fact, our application specifically asks the user
for permission before installing the extension.
My issue is that the member has to affirmatively ask for the extension to
be enabled before the permissions dialog comes up. Is there any
programmatic/command line way to get Chrome to bring the permissions
dialog up? The user still has the choice of rejecting the extension, but I
would like to present the user with this choice, rather than relying on
him/her to try and enable the extension later.
[ I realize that editing the Chrome Preferences file in the installation
script will install the extension without any user intervention, but I
don't want to do that.]