Ok. Yes, the ECC is done at bit-level (or "block" level), I think I understand. Weird stuff those NAND-chips. Seems like they don't really want people to write to them, only to read. Well, at least a couple of hundred times, before you need to buy a new one.
Forgive me then for being a little dizzy this evening, so the process of converting the dongle would be like this:
1. Desolder the flash chip from original card, read it with Hard Copy (I'm a big fan of Hard Copy by now)
2. Solder the chip onto the PS2 card
3. Patch the inteded image (Soul Calibur III) with the signature data ( at adress ??)
4. write to chip the patched image via the USB card reader, while ECC is doing its thing.
3. Desolder chip from the PS2 card and resolder it to its original system246-card... And hopefully play the game?
Am I any closer to the devine truth now?
I wonder why no one has made a youtube clip on how to do this. People do videos about stranger things.