This Script is a modded version of RockBox Cover Creator by Adrian.
This version is meant for people who use the iRiver in plugged-in mode to listen to music and keep in sync with the mp3s on Harddisk.
You need to set a root folder for your music on your HD and on your RockBox player in amarok_cover.sh
Then there will be two cover.bmp created: one on HD, and one on RockBox.
Also, this Script is Umlauts and Unicode-safe.
Hope someone finds it as useful as it is for me.