to finish the question.......
Yes it does affect NAND or NOR.
Along with what Stormeah and Dreamwebber are saying.
You might want to consider purchasing a second console or installing the progskeet or E3flasher.
If you are on a NOR console, the E3 is supposed to be hitting the shelves pretty quick in a completely solder-less solution.
It will still involve the use of a second hdd (for the swapping of firmwares.
I believe the NAND solder-less solution is supposed to happen fairly soon after the NOR comes out.
We will have to wait and see.
What console do you have and what firmware is on it?
BTW, welcome to PSX-scene!
I would much rather go to my grave not needing my gun, than go there wishing I had it.