PowerShell & Windows Installer

hi all,

I wish someone here as some knowledge about running Windows Installer with PowerShell because I've hit a brick wall pretty solid and I can't find anything on Google regarding this.

I'm trying to create a script that takes an MSI file, creates a Temp MSI File, edit it to change some properties, and generate a Transform (MST) file by comparing both files and doing a delta.

everything works correctly except the MST file that is not getting generated. From the VBS example I found on MSDN, the function is pretty easy but it won't work.

here's what I have:

$oAlteredMSI

=New-ObjectMicrosoft.Deployment.WindowsInstaller.Database($MSIDuplicatePath,[Microsoft.Deployment.WindowsInstaller.DatabaseOpenMode]::Direct);

=New-ObjectMicrosoft.Deployment.WindowsInstaller.Database($MSIFilePath);

.GenerateTransform($oOriginalMSI, "C:\Temp\Transform.mst")

when I run that command, I got a return value of False, even though this is a copy of the MSDN script.

If anyone has an idea why I'm stuck, please help!

thanks!