Would this work to delete the update nag from emunand?

I was thinking, would it be possible to take a Gateway emunand, use EmuNAND tool to extract the NAND.bin, use the Gateway launcher to inject the NAND.bin to the console's sysnand, and then use the recovery button combo to delete the nag, before dumping the NAND again, to inject back into emunand?

I have a N3DS with 9.2.0 sysnand, and 9.5.0 emunand.