Well, it looks like something is corrupted, don't look like the video bios, really. Looks to be the boot file on the media you are using.
It seems to be, booting to a Win 98 created image and trying to run the update utility for flashing a 9800 GT of 512MB in size. Then, dropping to DOS prompt at the end; but, that is giving no drive letter is odd. That may mean:
1. The boot media is not correctly created
2. The boot device is faulty or not reading correctly
3. The boot devices DOS driver is incorrect on the boot media or improperly set
4. The batch file called is not built(programmmed) correctly
5. The motherboard bios is faulty
6. Maybe, a few other things I might be thinking of at 4AM in the morning.
It, almost, looks to be the boot device's media is being read as an ASCII file, instead of running as a executable file. Instead of a file being run as a .com or .exe file, it is being interpreted as a text file, usually happens when someone mistypes the file name or calls the wrong thing in a batch file (ex. typing erase.txt instead of typing erase.com or .exe ending).
Rebuild the boot media, check the device driver for the DOS boot device(make sure legacy device for USB is on in the MB bios, if using a USB device and\or the CD\DVD DOS driver is correct for the one you are using, since it looks to be Windows 98, you may need to look at this:
Command-Line Switches for MSCDEX.EXE).
If you are using a batch file to call\run the bios flash file, make sure it is making the correct calls to the correct files in the correct locations.
Hopefully, some of the others have ideas.
Did you ever get the correct bios from Inno3d or someone with that card?
The reason I was wondering, is because you are still trying to flash a bios for a 512MB card by these screen shoots and you say you need a 1024MB card's bios.
Just wondering, 'cause if you find one it would help others for it to be posted to the TPU GPU database.
Disclaimer: Like I stated earlier, it is 4AM or so, no coffee yet, so I am not a responsible individual at the time of this post. There may be errors or omissions!