Hi,

Double check the error your getting, it may be a different file name to the one which is in the ReadMe. Looks the same but different, if it is let me know I'll emailing you the file your missing. (I had that problem at one stage).
Good luck with retro fitting the Satnav that will be a big job.......
I've done the DICE Install, its best you do the iBus Mod first as it will use the same cable that connects to the DICE.
If you need help updating to the Latest Nav software let me know......
One that I want to do is Bluetooth kit mine

Regards
Rod