think ive bricked innotab 3

[h0ppal0ng]

I got it from here deak, so i most probably used a dodgy memory card. Is the only way i can reflash by following how you did it on here? Id like to get into firmware hacking but dont have a linux system or have a clue how to do it. Ive been looking at the spiffyhack after i changed it to do a 3s system dump to see if i can change something so its not upside down, but dont know what im looking for. Thanks