By far the easiest solution to this is to get a programming cable from eBay/Amazon, and use the free CHIRP software to program up your channels. If you do this, there's a scan column where you can say whether to include or skip each channel in the scan. (It's also possible to set the channels to receive-only, by setting the offset direction column to "off").
I don't fully understand your post - unless you're just copying an existing channel, it's not possible to program in channel mode - you need to be in frequency mode to enter the frequency!
If you haven't already, then take a look at Miklor.com's UV82 Pages
- should tell you everything you need to know about programming them.