Thanks for answers
I was wondering if there is some bit of wireless kit that I could plug into the empty port on the wired router, I can't be doing with yet another cable trailing around the house for the Wii & would still need something wireless for the 3DS etc. I know that I could get a wireless dongle but then the PC would need to be on at the same time.
If I were to get a wireless router & connect it to the empty port on the wired router, would that work & not compromise security on the three PCs?
I'm not sure what encryption modes can be uses with the Ninty consoles. Never done wireless stuff before..... I think my tin foil hat looks good on me by the way.