You'll need KPG-95DGN from your firendly Kenwood dealer. Once the software is installed, you can read the current programming and change to your needs, or you can create a new file. It's quite simple--File->New Personal File. Then click Model->Product Information->Read Configuration->OK.
Then have at it. It's one of the most complicated to program Kenwood radios and the software is expensive. It is a great radio though. However, since you have a K7, you only have 64 channel capacity (128 channels if it's a Version 3 hardware radio)