No problem mate, just use format emunand, restart when its done then copy rxtools.dat to your sd card and the rxtools folder and use that if you dont know how to if you want to use latest rxtools beta. and if you want to use offline system settings to load it downgrade mset app to 4x and copy rxinstaller.nds to your acekard launch it and select 4.x dg and you can then load rxtools from system settings other settings and ds profile settings if you dont know how to if you do then great! And i reccomend you also do system nand backup with gateway after you do emunand and copy the nand.bin result to your pc and somewhere safe, this has saved me a few times
I've done everything up until trying to load the nds file, I cannot get my acekard to load. Whenever I try to do it, I get the black 'Can't let you do that, power off' screen. Do I need to be on 4.5 do get that running? My base system is on 9.0. I ran the RXTools MSET exploiter.