To the OP:
As pointed out, follow the link to Mark's scanners, the manual there is very easy to read and understand. Also as mentioned, get yourself a copy of a scanner program to make programming your scanner much easier. I used (I want to say) ARC300 from Butel for my 163 and it works flawlessly.
Be patient it takes time to learn new things, and programming this scanner can take some time in understanding, but once you get it down, you'll be programming new freqs in a flash and enjoying your time listening. Drop me a private if you need more info.