I tried the procedure described on page 17. I started from the V26.00 image. I replaced the splash screen with the ///M logo, replaced the navboot file in the image, burned it, entered the disk in my navi unit. I got the message that new software would be installed, blablabla, reboot, ...might take up to 6 minutes... and a few seconds later (certainly less than 20 seconds), I got a message that the update was successful, and that I could remove the disk and press OK. So far so good.
NOTHING CHANGED????? Still got the old splash screen, the version info I entered is not found (just reads 4.1.60 or something like that).

I entered the cd in my pc, copied the navboot file to my hard drive, checked the splash image again with the gifextractor, and I really did burn the correct image.

What did I do wrong?

Thx!

edit: @M3QP: working on that file. As soon as it is finished (and it works), I'll upload it somewhere, and post the link.