Hard to decipher what you wrote, But I think I got the gist of it.
"My problem is the Xbox Console, if using a Xbox Wireless adapter, can the Xbox stay in sons bedroom" = Yes (Connects Wirelessly to your Router).
"Also can the Netgear Wireless USB adapter & the XBox Wireless adpater both be fitted to one pc or have I lodt the plot and got it all wrong."
I think you have lost the plot [JOKE ;o) ].
Just connect the Xbox Wireless adapter to XBox(360) and connect through router.
Has the xbox got a hard drive fitted ?