Nope. Do this:
1. Download gateway software package.
2. Put launcher.dat on the root of your SD.
3. Go to the go.gateway.whatever page on your browser.
4. Select format emuNAND from the menu.
5. Profit
After that you can boot rxMode into emunand.
When, and only when you are on emuNAND, change the icon style (for example choose a lot of small icons, or whatever different to sysnand)
This will help you identify when you are on emuNAND and when you are on sysNAND.
Triple check you are on emuNAND and let it be with wi-fi on for a moment until it auto updates the FW.
PS: Also, before that make a backup of anything on your SD as it will be deleted.
PS2: There are alternatives to make an emunand without deleting SD, I think, but if you want to know how search in the forums.