I was on palantine, you need to follow this tutorial which will install rxtools on a 2nd nand on the same SD, once you have rxtools installed and updated then replace the rxtools.dat with the one the OP uploaded.
[EDIT] Forget what I said, versehells idea sounds better VV
1. Yes with pbt or palantine
2. - Extract your cfw rednand with this : https://gbatemp.net/threads/release-3ds-multi-emunand-creator.381603/
- Reinject it as an emunand
- Update the emunand with rxTools.
Thank you so much. i'll try it












