After a hack report I read at http://www.videohelp.com/dvdhacks/onkyo-dv-sp404e/7658
, I have discovered that the Onkyo DV-SP404 is a Pioneer DV-490V in pure flesh and blood. If you clicked on the first URL, you will notice that the first three letters of the Onkyo firmware are YEB. The first three letters of the Pioneer firmware are YDB. Yet the Onkyo and Pioneer firmwares are interchangeable! This leads me to believe that North American Pioneer Elite universal players as of 2006 might actually have international counterparts. For example, DV-46AV = DV-696AV, DV-48AV = DV-600AV, and DV-49AV = DV-610AV. Therefore, even though your DV-48AV's firmware begins with YGE, the DV-600AV firmware that begins with YGC might be compatible with the DV-48AV! The odds are 50% you could harm your player, and 50% everything will go very well. Because I just told you the odds, it is not my fault if you wind up with a damaged player should you decide to try this experament. If anything ever did go wrong, it would probibly be less expensive just to replace it with a DV-49AV, as opposed to paying for out-of-warranty parts and labor repairs. Here are the instructions for making the DV-48AV multi-region in case you are interested.
1. Check your DV-48AV's firmware.
A. Turn on the player. Wait for the 'Loading' message to disappear from the TV screen.
B. Press 'HOME MENU' on the remote control.
C. Using the arrow keys, highlight 'Initial settings.'
D. Press 'ENTER.'
E. Using the arrow keys, highlight 'Options,' but do not press 'ENTER.'
F. Press 'DISPLAY.' You will see your current region and firmware version.
G. Press 'HOME MENU' to exit.
2. Download http://www.pioneerfaq.info/click/click.php?id=424
for multi-region, and if you are a Pioneer purist, http://www.pioneerfaq.info/click/click.php?id=416
for the most up-to-date Pioneer factory firmware. (There is no YGE8827A firmware at that site because the person who runs it works with European players, but he/she told me that unmodified factory firmware is not country specific and does not change the region and TV system).
3. Unzip the files.
4. Change the file names from 'YGC8827A.BIN' to 'YGE8827A.BIN.'
5. On separate discs, burn the multi-region version and the original Pioneer version with each disc having 'PIONEER' as its volume label, without the quotes. Because these firmware files are both called 'YGE8827A.BIN,' you should mark the label side of each disc right after you burn each disc so you know what firmware you will be installing.
6. Insert the disc with the modified firmware into the DV-48AV.
7. Press play on the front pannel when you see the onscreen prompt that tells you to do so.
A. As soon as the tray opens, IMMEDIATELY remove the disc. Don't touch the player until the tray closes and you see the factory default startup screen. If the auto-upgrade portion only took a minute or two, procede with step 8. If ten minutes elapse and the TV screen is black while the front pannel says 'Loading,' do not press any buttons on the front pannel or remote. Procede with step 7B.
B. Push the tray in by hand. Disrupt power to the DV-48AV (unplug the power cord from the wall or the back of the player, turn off the power strip, etc.).
C. Wait a few seconds and reconnect or reactivate power.
D. Turn on the player with the power button and procede with step 8.
8. Select your language.
9. Select CANCEL.
10. Hold the ENTER key to the right of the 0 until the player turns off. Now it is multi-region even if it still says Region 1 if you were to check the firmware. Also, now that you made the EEPROM multi-region, the player will remain multi-region no matter what firmware you install unless you hold the CLEAR key to the left of the 0, using the modified firmware.
11. Turn the player back on.
12. If you like the extra features, then go into the setup menus and reconfigure your preferences and you are good to go. If you wish to return to strictly Pioneer firmware, procede with step 13.
13. Insert the disc with the original Pioneer firmware.
14. Press play when you see the onscreen prompt that tells you to do so.
15. As soon as the tray opens, IMMEDIATELY remove the disc. Don't touch the player until the tray closes and you see the factory default startup screen.
16. As soon as the tray closes and you see the factory default startup screen, make all your prefered settings and you are good to go. Good luck!