my IP is 67.48.243.5 but the ip on the ds has 12 digits in it. how do i enter my 8 digit IP if im required to type in 12 on the ds?

First of all thats your external (internet) IP, so if you're connecting on your own network you need the ip address of the machine running the server (which you can get by typing ipconfig at a command prompt)

Second, read the readme... it tells you to pad out your IP with extra zeros if you have a number like 5 its 005, so yours would be 067.048.243.005.