right, i dont have a router of any kind, im running my 360 through my laptop by network cable, connect to live no problems, plays in matches on Live etc. but playing Halo3 i get problems joining games and saying my "NAT" is set to strict

my internet connection isnt your usual either, as i have no phone line in my house, i invested in a Tmobile web n Walk modem, basically just put a sim card in it, it dials. no cables, and away we go, 3.8mbps internet which is great.

is there any setting i need to change on my laptop to show my xbox the NAT isnt "strict", or is there no way i can change it?

all help would be great thanks

shieldz.