Make sure you formatted your SD card so that there's a 1GB partition at the head of the device.
Open hex workshop as an administrator. Click Disk>Open drive. Change "Select:" to "All". Choose your device (Named "physical disk", just choose the one with the right size). Go to Disk> Restore Sectors. Change the Source file to your nand.bin. Under "target range", change starting sector to 1. Click OK, wait for it to finish.
You did it, GG.
so wait so can we use this with emuNAND and not touch our real nand?

That's how it works. Won't work without a proper emunand setup.

Okey then it says an error happened okey this is crap, what ROP do we need to use, gateway one is bad ?

Which one it is, I tried one (Which was from fierce wallfe or something like that) now my DS mode is bricked (Says error occured even with retail games).
Will format the 3DS and try another one..

st4rk Why did you take it down? Anyway, here it is in zip format:
https://mega.co.nz/#!GpViVIbR!RRA6arDTY56DzI-p1ww4tbjOG-7RkKglBN232Q4IS3k
I am not the owner of it, bitchie
Question:I'll say exactly what I said to someone else:
You gotta write your emunand bin to your SD card starting at sector 1 from a hex editor.

Even with multi rop using homebrew ROP it still says an error occured when I select DS profile. I dunno what's wrong but I think I'll just pass on this.