Can't believe I found this:
[color="red"]I very strongly recommend that you d/l this immediately![/color][Please Register or Login to download file]
Directions for Simple Unlock for c230 and possibly other 320x240 devices:
The directions are simple. Unzip the files into a folder on your computer. Copy the folder "Script", the file "autorun_ABC" and the text file "autorun_ABC" onto your SD card. Those files are for the unlock.
Put the SD card into your mio and do a hard startup. Miomap will start up like usual. Once it loads, simple do a soft shut down hitting the power button once and when the screen turns black hit it again. This will start the unlock.
You will see a prompt to start the autotool (or something like that), hit "yes"
The unlock will start loading, then you will see a screen saying you successfully unlocked your device. Hit "ok"
The unlock will be running. From here you can load miomap, but miomap doesn't have an exit door you can see to close it and get back to the unlock. To solve this we simply "unhide" the exit door.
Unfortunately this means replacing a file in your data.zip, this is easy though and I provided the file in a folder called "Stuff to add exit door for miomap (Do not put on SD card)" This will be in the folder you unzipped onto your computer. In that folder you will see directions on how to make an exit door on miomap. This is nice because it allows you to exit or close miomap and go to the unlock. Once you replace that file, you will be able to run miomap and close it anytime you want. ** Directions come from kombits.com