Used the Scripts for Adobe Flash installation by Der-Matze as the starting point.

Improved it so that just one script is necessary and a product property is used to decide if it should be installed for IE or other browsers.

Tested with opsi 4.0.1
Tested with opsi-winst 4.11.1.6
Tested with Windows 7 Professional 32 and 64 Bit

Installation Script for Adobe Flash ActiveX 11.0.2.202.233 with custom settings file
Uninstallation Script for Adobe Flash ActiveX Versions 10.0.45.2 - 11.0.2.202.233

The installation files can be downloaded from: http://www.adobe.com/special/products/flashplayer/fp_distribution3.html (You may need to apply for a distribution license!)

Note: settings.sol can be found in “%UserProfileDir%\Anwendungsdaten\Macromedia\Flash Player\macromedia.com\support\flashplayer\sys\” and customized via Control Panel\Flash Player. You might have to run the configuration in the Control Panel before the file is created.