.bin files are compiled ( meaning that you can't always properly view the source in a text editor). Running a .bin file is usually as simple as this: ./file.bin
.bin (binary) files generally do something besides extract the RPM it contains when told to execute. Sun does this a lot with their java packages. Running the .bin file will present you with their license agreement. Failing to scroll through it all and accept the agreement will prevent you from gaining access to the RPM within it.
Bill