how to configure router's port forward

Hi everyone.

I just got a Linksys Wireless router ( wireless-G 2.4 GHz ) with a Comcast broadband cable connection.
I also use the e-Mule++ p2p software .

But in my e-Mule, I'm told I have a "low ID" due to not having configured my router's port forward
I am trying to configure it so my uploads and downloads would be at optimal levels.

Any kind soul can help me with this?

Let me remind him/her that I am not exactly technical. so please be gentle ... meaning, explain a bit in simple terms and words so a Neanderthal like me can understand and follow.

Thanks all
Cheers