ethernet sharing bridge

hello, my motherboard has 2 ethernet ports, one goes to my main router, the other is empty

i want to hook up another wifi router to my pc to create another wifi access point.

i was able to bridge both ethernet ports and get my host computer to obtain the static ip settings i need, but how do i setup the other part (the router)

my computer currently has
ip - 192.168.1.139
sub - 255.255.255.0
gate - 192.168.1.1 (dd-wrt)

i would like the router hooked to my pc to be 192.168.2.1 and dhcp from there


any help is greatly appropriated
thank you
seesoe

*bump*