HDD Loader v1.2a is the only way I could get several of my originals to play from the HDD, the most memorable being Voodoo Vince. I'm using an X-bit in my v1.3 Xbox running Evox M7 bios and Evox Dash 3921. I don't like using the Loader to actually load the games though, so once they're ripped, I rename them from PxGame0 (or what have you) in the HDD Loader folder and move them to my games folder.
I tried dvd2xbox, but for what I wanted to use it for (backing up games) Px HDD Loader was the better option.
I have noticed that Px HDD Loader doesn't always properly recognize eject fix. 3 out of the 4 bioses on my X-bit have eject-fix, but it only "saw" two out of the three bioses as having it; there was one time when it didn't pick it up on my Evox D6 bios too. I guess what I'm trying to say in this last paragraph is, don't necessarily trust that text. Check and see if you can eject while in HDD Loader and try to back up your game. Worst case scenario, it will reboot B)
Sorry I have no input to your dvd2xbox problem. Good luck!