>1) do I need to setup the wireless router to port forward too?<
Yes.
>2) if so.. how do I get to the correct IP address for it. Since the only IP I can identify is the cable modem _Default gateway<
Windows?
Start > Run > "cmd" > OK > "ipconfig"
Running ipconfig in your DOS window will let you see your IP settings, for example:
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : xx.xxxx.xxx
IP Address. . . . . . . . . . . . : 192.xx.xx.xx
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : 192.xx.xx.xx