There is more than enough information in the last 52 posts to restore the firmware on your Zune. Read them all, the methods have evolved over time, so do read them all before attempting. People are posting on this their attempts and results, how they succeeded in restoring their firmware, to make up for Microsoft's short comings.
Francisco above all has more than enough responded to people when they haven't been successful with the methods. He isn't paid and has created packages and methods for others to make it a easy as possible. He doesn't get enough thanks, thank you Francisco.
If you want a simple step by step manual and package I suggest you approach Microsoft with your demanding posts and requests. Anyone with a component level of IT knowledge, technical skill will succeed with the information over the last few pages. I know it isn't a NEXT ,NEXT NEXT, FINISH method, you have to understand a little about your machine and what you are trying to get it to emulate.
Francisco may meet your request, though I believe its time he started charging for his time!