Here is my unlock i used on my device while it was my main device.
It is designed for the Medion Gopal PNA210T but it will work for any device that launches an exe file after boot up.
The medion loads windows ce and then runs \My Flash Disk\Menu.exe which is the original menu program.
So... Connect to your pc using activesync and on your device rename \My Flash Disk\Menu.exe to Menu2.exe and then copy ...