ISUser04:
Thank you for your question regarding AdminStudio.
It seems like the best move would be to use a custom action, and use some VB code to copy the PDF file, using DevStudio/Developer. Insert the custom action as early in the process as possible, and that should do it.
As a last resort, you could always create a second MSI just to copy that file for you and run it before your main install.
Anyway, let us know if you have any other questions.