Port fowarding troubles

[N-dog]

I have My pc connected wirelessly to a imac G5 which is connected to our broadband router.
it looks like this:

(Internet)---phoneline---(Actiontec GT701 Router)---Ethernet---(iMac G5)---Wireless---(My PC running windows xp)

i can easily port forward from the router to the imac (and have), but cannot port forward it all the way to my computer. I have no idea of what to do. Ive done lots of research but come up empty handed of how to set this up. does anyone know how to do this?

[bacter]

You could try to use the wirelessfeature from your router and set up like this:

(Internet)---phoneline---(Actiontec GT701 Router)---Ethernet---(iMac G5)
                                                                    !
                                                                    *--Wireless---(My PC running windows xp)

This should work a lot easier than share your internet connection through your iMac.

[N-dog]

I would but my router does not have wireless...

[Foggy]

is it running XP or OSX?

I know how to forward a port in XP when you use internet connection sharing but I dont know how to in OSX.

[N-dog]

it has OSX sadly