Create a new image (130x130px)
Add your content and save it - generic formats like png, jpg or gif should be fine
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Install Perl and its GD-bindings if not already present
Convert the image (perl img2lcd.pl -v myimg.png myimg.lcd)
Connect your PC to rad1o using the left USB port
Turn off your badge, hold joystick up and turn it back on - MSC mode should now be enabled
Copy the file to the newly registered mass storage device
Wait, until the green led at the left botton of the badge stop blinkung. This indicates that the write operations are done and unmounting is safe.
unmount(!)
Press the joystick to end MSC mode. The device now disconnects
reboot - you can now load the image using the menu