If you want to use Spark 2.5.6, I would suggest that you download a program called “Advanced Installer.” It has a freeware option which legally allows you to build simple .MSI for any use.
I got Spark to deploy via GPO by doing the following (Windows XP SP2 Clients only):
-Downloading and installing Advanced Installer on a common test system
-Download and install the .exe version of Spark
-Build a simple MSI package by copying the Spark (C:\Program Folder \Spark) folder as the Application Folder in Advanced Installer. Spark does not have any reg. setting of importants when it install I found.
-I created All User icons from the Spark.exe file for the All Users Start Menu and All Users Startup Menu, and made sure that you need to be an Administrator to install the package.
As a note, the System Tray icon will not work for Spark 2.5.6, but from what I’ve been reading it’s a bug in that version.
Hope this helps, I spent 6 hours trying to get Spark to install from the MSI, before I found out that the posted version was corrupted.