How do you update Installation URL in Setup.exe?

Howdy folks,

I am publishing a smart client that gets copied to several servers
between development testing, formal testing, and production. I use
mage.exe to update the provider url in the application files whenever a
version of the smart client is moved from one server to another. The
problem, however, is that the installation URL seems to be embedded
within the setup.exe file that gets executed when the client doesn't
have the .NET 2.0 framework installed.

Here are the steps that produce the problem:

1.) Publish the application with an installation URL of
http://localhost/Applications/SmartClients/AppName/

2.) When the files are copied to the destination server (different from
localhost), run mage.exe to modify the provider url and apply the
certfile.

3.) When the URL to publish.htm is loaded on the client machine, the
page says that the .NET 2.0 framework is required, click "Install" to
install it.

4.) The Install button is clicked on the publish.htm page and setup.exe
is run on the client machine. The .NET 2.0 framework is installed, and
then it attempts to download the smart client. At this point I get the
following error: "An error occurred attempting to install AppName".
Expaning the details reveals that it failed to download the
"AppName.application" file, but the URL its using is the box it was
originally published on.

Is there a way to update setup.exe so that it knows where to get the
application after the .NET 2.0 framework is installed?

Thanks,
Dan