Hey, I have an Elitebook 8540w! I got it out of storage and tried the browser/email button but unfortunately doesn't do anything. (They are capacitive buttons though, does it really work on an EliteBook 8540w?). I don't have the HP_TOOLS partition either, but this would work great for dual booting? If you press the normal power on button it boots in Windows, if you touch the "browser" button it boots in Linux. Will try some more things.
Update: I had the quicklook/quickweb stuff disabled in the BIOS, I enabled it and lo and behold the computer booted when touching the browser button. Cool.
Update: I had the quicklook/quickweb stuff disabled in the BIOS, I enabled it and lo and behold the computer booted when touching the browser button. Cool.