I have used it with the CD input and tape input. The 7.1 Direct, phono, and tuner inputs can't be renamed because they are sort of specialized, but the AUX, CD, and TAPE inputs can be renamed just like DVD and VIDEO1 through VIDEO5.
To change the name of an input (any video input except 7.1 Direct and any audio input except phono or tuner), go to that input's setup screen (MENU | INPUT CONFIG | GO TO AUDIO INPUTS if you are interested in an audio input | input name). Once you're there, the first line will be NAME. Highlight that and press SELECT on the remote, at which point you'll be able to use the left/right cursor controls to highlight individual letters and the up/down cursor controls to change those letters.