Open Chirp, Hit the file button, click the "new" tab on the drop down menu, then go to the Radio button, click on the "import from datasource" tab on the drop down menu. you will see a drop down menu appear to the right, and it will have Radioreference, repeaterbook, prziemenniki, and RFinder. Pick repeaterbook ('cause it's free!), click on the tab, and it will give you a small box to pick what State, County, and Band you want. Say you do 2 meters first. You will have to import those to the "new" file that you are building. After that, you just do the same thing over and add the 440 repeaters from your area to the "new" file, and save the whole thing with whatever name makes sense to you. You can set your channels to scan or not to scan with the software just by clicking the "S" button. For adding the simplex stuff, you do have to manually type in the frequencies. The program was a little fickle on my computer, and you have to click the line you want, and double click the frequency box to highlight it. Then just punch in the frequency you need. I had to play with mine a few times, but you really can't mess anything up.... you can always delete it, start a new file, and do it over.
73,
Brett