thomass,
If you will not success with UsbNetwork, I think you have another way to restore powerd:
1. Prepare unmodified powerd file and create rundk.sh script file which will copy powerd to it original location (I have prepared it for you, see attachment, but I not checked it):
Code:
#!/bin/sh
mntroot rw
[ -f /mnt/us/powerd ] && mv -f /mnt/us/powerd /usr/bin/powerd
sync
mntroot ro
shutdown -r -F now
2. Enter recovery mode (Hold down [Enter] while rebooting) and choose "E -> Export over USB". Very important note:
Do not try Reset to factory default or other options in recovery menu. You will damage your Kindle much more than now.
3. Connect Kindle to computer via USB cable. Copy powerd file
to root folder. backup file DK_System/bin/rundk.sh. Copy our rundk.sh script
to DK_System/bin
4. Reboot Kindle and choose to run Duokan. It will run rundk.sh and restore powerd. After this Kindle will reboot. you must choose to run original Kindle software rather Duokan. If all OK, restore rundk.sh from backup.
Good luck.