Back around two months ago, when I first built the NTFS4DOS ISO image, I tested it on my MS25. I was able to flash it no problems, and thus was included in the tutorial. Lately, people have been having problems with using it, so I decided to try it out again tonight. I had an MS28 drive that needed to be flashed, so I used Xtreme Boot Maker, set it up for NTFS4DOS CD, and dumped the files to C:/XBF/. I hooked up everything, booted from the disc, mounted my drive, changed directory so that I was now in C:/XBF/. Booted up 360, SAMREAD, powered down 360 at the MTKFlash list, selected the drive, waited ten seconds, powered up 360 again. I was surprised to see the reading stop at 01% and then throw up an invalid opcode error. The green led was flashing rapidly because it had tried to read before it errored.
I powered off the 360, rebooted PC, and tried again, this time using the mtkflash r /m /sata orig.bin command instead of SAMREAD. This gave me an extra choice, XTREME, so I chose that one when doing the bad-flash method -- same error at 01%.
I remember somebody saying that the NTFS4DOS CD didn't work outside of the root directory, so I booted back into Windows, moved the contents of C:/XBF/ directly onto the C:/ drive, tried again. Error ... and ... error.
Then made a bootable floppy and USB using the same exact settings for Xtreme Boot Maker. The only difference was the boot device. Floppy worked with bad-flash method, USB worked with bad-flash method.
Conclusion
The NTFS4DOS CD cannot be used to bad-flash an MS28 drive. If anybody has found anything contrary to this, please speak up, it would be hard to believe. I'll check later about the "root directory" requirement, but I just wanted to post this for anybody pulling their hair out.