Have macro run every time I make new PowerPoint 2003 presentation based on specific template

Experts,

I have what sounds in theory like a simple request...

I have a POT file created to be used as a template for creating new decks.  What I want to do is,
whenever a user creates a new deck based on that template, I want a MsgBox to display with
some helpful hints.

I know how to code the MsgBox.  What I cannot figure out is how to get the code to run.
Powerpoint is exposing Application events, and I am familiar with using a class module to trap
Excel.Application events, but I cannot figure out how to do it in PowerPoint.  The VBA help file
shows one method, but how do you actually get InitializeApp to run?

Regards,

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