Yep, it's the classic 'Ba-ding' GameBoy sound for your gp2x.
Just put this on your SD-Card, press and hold Start and Select while turning it on until 'Upgrading Firmware' appears.
You may then remove the file from the card.
Note: Only works with FW 2.0.0 and higher.
Just put this on your SD-Card, press and hold Start and Select while turning it on until 'Upgrading Firmware' appears.
You may then remove the file from the card.
Note: Only works with FW 2.0.0 and higher.