The way that MW3 Chaos works is that it transforms a private lobby into a public lobby witch makes you always the host. If only we can reproduce that....
I tried jordnel's tutorial on force hosting. Still doesnt work on mine.
*EDIT* After re-reading Jordnel's Tutorial, I did my own research.
My address for Force-Hosting is this:
0x05AA40C8
Changing this to 1 when the game's search for servers, makes the game starts and makes me host.