Okay, so by ST'ing from N3DS to O3DS you'd get the game required for NFIRM downgrade, and you would then wait 7 days to ST back to then hack the N3DS. I see what you mean, but it's impossible, as there is literally no way you can ST from a N3DS to an O3DS. Even if it was possible, would it be worth for just $2? Just do the normal DSiWare downgrade hack, and buy a compatible DSiWare game for a mere $2 on the O3DS.
Once you ST from O3DS to N3DS and complete the hack, you can then format the N3DS to re-link the old NNID and still retain Zelda on that console for whatever reason you may need it for.
All my important games are in cartridge format.... so could I just format the N3DS to unlink the NNID, then link it to the CFW system to download the DSiware? Afterwards, I can just follow the guide to hack the N3DS.
EDIT: I tried, but the warnings before formatting explained it.
Last edited by Mr_Charlie,