IS250: change the maps DVD
TESTED ON: 2007 IS250 Sports with enhancement pack
SUCCESFUL/FAIL: Success
LEVEL OF DIFFICULTY: easy (Lexus even supplied the tools!)
INTRODUCTION
So you've got your shiny new maps DVD. Perhaps you "found" it online or perhaps you've been kind enough to store an "offsite backup" for a mate with a Toyota/Lexus that uses the same system. All you have to do now is get the disc installed.
STEPS
Rather than attempt to explain this myself, I thought it best to let Lexus do it. The attached PDF below contains all the information needed, including where the tools are in your Lexus toolkit. The pertinent information starts at page 14.
DEMO
If you still can't figure out how to get to the DVD, I've included a video below to show you how it's done. If the embedded video doesn't play for you, you can download a XviD avi file here (approx 4.3MB).