Hi

Not sure, whether I misunderstood something here.
Anyway, you can use both interfaces on your PC. For the setup
you describe, the route command[1,2] might be useful.
The idea is to send all traffic for the "WAN" via the "WAN"
interface, all the rest via the cable modem. Have a few more reads
regarding similar issues[3,4,5]. Note, since you have written
"made two LAN connections" I take it that you run Windows OS.

Of course, you could try to perform traffic shaping[6].
This can be nicely done on a Linux box. I am not sure,
what you have available, what are your requirements, and
how much you can do, hence I am not going into much detail,
but have a read for example here[7].


Cheers



[1] http://www.microsoft.com/resources/d...-us/route.mspx
[2] http://support.microsoft.com/?kbid=140859
[3] http://www.antionline.com/showthread...hreadid=267740
[4] http://www.antionline.com/showthread...hreadid=266584
[5] http://www.antionline.com/showthread...hreadid=270026
[6] http://www.linuxguruz.com/iptables/h....4routing.html
[7] http://linux.com.lb/wiki/index.pl?no...ltiple%20Links