Check out a couple different guides for the DLINK. (other models) The firmware version may have been updated. One will look similar.
As you read the guides, keep in mind what you want to do: you want to send all the packets that come to a port on the router to the same port on your server.
So you should have 4 entries, one for each port, 80, 29000, 29100, 29200
it should be that starting and ending port. they address you would use would be that of your PC (ipconfig)
It gets frustrating, but you'll get it. Hang in there.