New Post: Deploying Firefox

I have to deploy Firefox and the Flash plugin. I tried to do this with the MSI version from FrontMotion. Whatever I tried, the update is not detected on the client. WPP reports the update as not installed.
Can someone help with the creation of the update. I'm asked to have Firefox installed by the end of next week and I really don't want to run from PC to PC so I hope you can help me.

Thanks.