Quick Deployment Question

I use the Inno Setup Compiler and ISTool to deploy my application.

One part of my application is a PDF printer driver - a custom version of the Cute PDF driver which I purchased for distribution.

I figured I could run the setup.exe for the PDF Printer Driver from inside my deployment package. But nope - it doesn't work. It runs but no driver turns up. When I run the setup.exe from outside my deployment package it works just fine.

I can run other setup.exe files from inside my deployment package - but not this particular one.

I think I need to request elevation or something I'm not doing. The problem seems to be related to 64 bit versions of Vista Home Premium. Sooo... what's the proper way to run a setup.exe from INSIDE a setup.exe using Inno?

Thanks!

--DB