First create static address (eg 192.168.1.2) in ur
router's Virtual Server Page also enter ur comp's name
Now again in virtual server create a custom rule called emule and for port map, end everywhere enter the port emule uses (Port 4661) or whichever u want to use for ur emule.Always select TCP/UDP in that dropdown box .Ok these settings.
Add the custom rule to right pane in virtual server page
Apply the settings
Save & Reboot
Now apply the following settings For ur LAN card
IP Address 192.168.1.2 (Same as u entered for Router)
Subnet
Mask 255.255.255.0
Default Gateway 192.168.1.1
Preferred
DNS Server 203.94.227.70
Alternate DNS Server 203.94.243.70
Click -> OK -> OK
Now the port u hav opened in Router must be same as in emule (In this case 4661)
Bingo
Finally If u didnt understand and are a N00b go here :
Emule port forward