Re: Port forwarding
Try the forwarding and there should be a custom applications config menu. what port does that use??I think its 6881, you input that into the setup of the router.
to turn the NAT off you would demilitarize the host you want to expose to the public IP space. there should be a DMZ host tab or simalar. Id only do this if you really need that machine reachable and this is mostly done for web hosting.
if all else fails let me know!