i also just purchased this during the black friday sale. Without even touching the manual, i was able to figure out how to program it.
Press Hold (if all channels are locked out, i believe you can skip this step)
Use the selector knob on top to scroll to the channel you want to program
press the PGM button (func+E)
and that takes you to the menu that has pretty much everything you could want to program in to a channel.
OR, use the programming cable it came with, along with the free programming software found in here:BC125AT - The RadioReference Wiki
(the link to the software isnt working at this exact moment, but if you'd like, i'd be more then happy to email you the file)