QTP and User Access Controls (UAC)

Hello! I am trying to solve a problem involving QTP and Windows Vista. I have a large number of testcases that require changing the UAC settings and then testing an application while logging in as a Standard User, Elevated Administrator, or Built-in Administrator. I haven't found a way to handle the UAC popup dialogs with QTP, other than to simply disable UAC entirely.

If anyone has any idea how to test under these conditions I would love to hear it. Any approach, or hack, that gets the job done would be welcome.
Thanks.

I haven't tried this one yet. Might be interesting.. However, from the looks of it, I think that the only way of handling it is by disabling UAC completely.