yeah or thatActually the easiest way to remove emuNand is to use Win32DiskImager or similar tool to write anything bigger than 512 bytes (for example, Win32DiskImager.exe itseft) to the SD card, the partition table would be overwritten. Then, just simply format the SD card, and emuNand would be gone.
just make sure you back up your saves and files from your SD card first though,as you will have to put them back on afterwards