It does work but the 9.2 FW requires you to have internet access to launch the exploit. This also means your going to get update nag on your 9.2 sysnand. you cant format your sysnand because it requires internet
4.5 can launch the exploit with the blue card or internet. Also if you get update nag you can format your console.
also downgrading lets you use the blue card for ds games.
Cool, thanks!!
Also in regards to my original SD card i was using (with my games and profile on), is it ok to copy all the SD card contents over to my PC, then stick this SD card back into the 3DS, do the downgrade and then the EMUNAND (which formats and wipes the SD card) and then after this has finished copy back over my SD card contents from my PC to the 3DS so i still have all my games as before??