yesterday i received an alpine PMD-B200P at my shop to unlock it, i look everywhere and nothing, so i decided to do my first step :o
i downloaded the firmware update from alpine website, i looked at files, and voila.
rename your script (Mio Pocket or anyone) to NaviUpdate.exe
or create a mortscript with the following line
Run("\Windows\explorer.exe")
i will post later a package ready to use. this is maybe working on the B100 or ...