As always you do this at your own risk and I will not be responsible for any damages to your drive, dvd player, or computer. Everything worked fine for me though.
If you'd rather see this at YouTube click here.
You'll need: A Western Digital USB Passport drive (or a drive that does not have it own power supply or does not work with your DVD player because of the power issue.)
A USB cable that plugs into the drive.
A 5v power adapter. The end won't matter because you'll be cutting it off but you have to be sure it's only 5v!! In the pictures I'm using one from an old D-Link USB hub. I ended up making two cords, the first one I used was a charger I had for an old LG cell phone, it had coloured wires inside, the USB hub did not.
The pins in the USB cable are:
Start out by cutting into the USB cable near the MINI end. Be careful not to cut any of the wires!! You'll see four wires inside (RED, BLACK, GREEN, WHITE) wrapped in aluminum foil and silver wires.
Carefully pry out the RED and BLACK wires and cut them. Strip the RED and BLACK wires coming from the MINI end.
Cut the plug off the 5v power adapter. There should be one RED and one BLACK wire, your's could be different. RED is power, BLACK is ground. I made a second cord and the wires were NOT coloured. I don't know if it makes a difference but I hooked them up and the Passport works fine. You might want to use a tester for this.
IMPORTANT: You will be connecting the wires together but only the wires coming from the MINI end of the USB cable. Connect the RED from the power adapter to the RED in the USB cable. Connect the BLACK from the power adapter to the BLACK in the USB cable. Remember it's the wires from the MINI end you will be connecting. You might not have coloured wires in your adapter such as I found out when I made a second cord. In this picture I did not. I don't think it matters which wires you hook up but I'm no expert when it comes to electrical stuff so you might want to test the wires.
Bend back the RED and BLACK wires that are going to the large end of the USB cable that you did NOT strip and make sure they don't touch any other wires, including the aluminum foil or silver wires!! Use small pieces of black tape to keep them by themselves. Use electrical tape and tape the whole works together ensuring no wires are touching anything else.
All taped up and ready to use.
The Passport drive must be in FAT32 format for the DVD player to see it and have a bunch of movies on it. You should now be able to run your Passport in your USB enabled DVD player :)
What you've done is cut the power that runs from the DVD player through the USB cable to the drive. You are now using power from a 5v power adapter you have plugged in. I would think that this would also work if you don't have enough power in your computer to run a Passport. I searched all over the net for a solution to this, or even a cable to buy, but found nothing. WD does sell a "Y" cable but this wouldn't work for me. It has two USB ends to draw more power to run the drive... my DVD player doesn't have two USB connections and I'm sure most don't. I've tested this in an LG DVD player and a Pioneer DVD player and both work great.
Thanks! June 10th, YouTube video featured on: GetUSB.info