Not to be nitpicking, but only to clear up my personal confusion:
IP Address..........192.168.0.x (x being any number from 2 upwards to 254)
Is that to say this IP Address would be like <192.168.0.2/3/4/5...> or as my router (Gateway) gives out <192.168.0.101/102/103....> ?

Or in other words is connecting 2 computers with internet sharing Box2>Box1>Gateway that different on the IP Addresses to what the DHCP of my router would be?

Box 1>------|
Box 2>------|>Router>Internet Connection
Box 3>------|

Note> My main box is 192.168.0.100 and the Gateway is 192.168.0.1

I know this is probably a very irrelevant point/question, but I tend to be very literal minded (sometimes).