Can someone point me to a openWRT over PirateBox flashing tutorial for this device?As PirateBox IS OpenWRT, you can follow each howto about reflashing.
I think, If you have a working PirateBox, the easiest way is to download the correct firmware from openwrt.org ,
bring it to the USB Stick,
power up your PirateBox,
Login to your PirateBox,
and then run
mtd write -r /mnt/usb/<filename> firmwareWhile <filename> is the name of the firmware file.
regards Matthias