Hi guys - really eager to try this upgrade... but want to do it right. There are an overwhelming amount of posts on here! I have an MKIV nav running 4-1/71.

FEW QUESTIONS:

1. Can I upgrade from 4-1/71 directly to 4-1/100, or do I have to upgrade to /80... 91 and then 100?
2. Once upgraded, will it hurt to run my v27.1 maps until I buy the v32 maps? Is it best to buy them from the dealer?
3. I like the night-time maps seen in other threads... but don't really understand how to use NavTweak, NavCoder, etc... should this be done after I do the first two steps?

Is there DIY post, or a simplified thread that walks you through a) where to download the most current Software b) how to create the image cd and c) how to perform the update?

Lastly - my car is still under warranty - would any of this be covered by the dealer for free?

Thanks!
Chris

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Current Vehicles:
2006 BMW X5 4.4i, Premium, Sport, Cold Weather, Rear Climate, Rear Heated Seats, PanoRoof, Air Suspension, Comfort Seats, Nav, Alpine White with Light Poplar and Truffle Brown Interior

2007 BMW 335i Coupe, Premium, Sport, Cold Weather, Space Grey With Dark Burlwood & Black Leather