Rule #1 with programming ANY radio:
Step 1. Read the radio.
Step 2. Save that file.
Step 3. Now save it again with a different name.
Step 4. Now save it again, but somewhere else.
Step 5. If you skipped steps 1-4, go back and do them. Really.
Step 6. Make your changes.
Step 7. If you screw up, fall back on original file, because remember, you saved it in a safe place.
Failure to follow Rule #1 will result in being permanently tagged as a "Noob". The dreaded "Radio Police" may show up and confiscate your radio (no, not really). Always having a 'known good' file to fall back on is important. Anyone who has been programming radios for a while will tell you the same thing. Do not skip this step. Do not skip this step.
Programming radios like these is not easy. There is a very steep learning curve. There are also way too many variables for someone to even be remotely able to type it on in one post. Best place to start is studying the file very carefully and then asking questions. If you have a legit copy of CPS, the included help files are really useful and will get you most of what you need.
Now, go back and follow the instructions under "Rule #1".