The 15-1924 remote from Radio Shack is an exact clone
of the IBM/X10 Powerhouse remote (pictured). This remote
is not made by Universal Electronics, the company that makes
most of the other Radio Shack remotes, so the programming
technics are different.
Use the link below to get a copy of the manual for the X10 remote, all of the features are the same as they are on the Radio Shack remote. You will need Adobe Acrobat Reader to view the manual.