1. Brought a
Airlink 101 USB-to-Ethernet adapter, and connected it to WDTV USB1 port.
2. Downloaded ext3-boot 0.8.5.3 and unzipped to an USB flash drive.
3. Connected a USB hub to WDTV USB2 port, then connected the USB flash drive and my media hard drive to USB1 (Either use a hub, if you want to have 3 things plugged in like hdd, ethernet, pendrive, etc.. Or you can format your hdd, to contain two partitions. One being fat32 and the other being another supported format, such as ntfs, ext3, etc.. The small fat32 partition would host the firmware).
4. Started WDTV box, the new firmware was detected by WDTV, then I flashed WDTV with ext2-boot 0.8.5.3.
5. Re-started WDTV box, the startup screen showed my IP address, and both LED on USB-to-Ethernet adapter turns on. I can also see WDTV IP address from my router.
6. I can play files from my media hard drive that is connected to USB1.
7. I can FTP to the WDTV and can see a bunch of files. And the the media hard drive connected to USB1 can be accessed from /tmp/media/usb/usb1?
If you want to have faster and better supported EXT2 or EXT3 filesystem, but have Windows OS:
You have to backup your data first, and then you can format USB-HDD to EXT2/EXT3 (Use Acronis or PQ magic or free RescueSystemCD+Parted for this job. Or you can use CLI interface over telnet, but I don't recommnend this to non-experienced user with Linux devices). Also you have to install under Administrator Acount on Windows EXT-FS support, reboot and after you will be able work with EXT2/3 partition as with NTFS