Paul
On an unused component (cable,md, whatever) preset the code 4106.
the numbers are now the TV inputs 1 thru 6. From here you can to a couple different things.
1.. leave as is and just add to your macro.
2. Relable on the TV page Video 4, Video 5, Video 6, then using the Key macro function add the input to the relabled button, then use in a macro.

Com/off mute
set
key macro
tv hard button
video 4
other, Cable component button (or whereever you put it)
4
com off
it will show you what you did, after that exit out the test.
repeat for other inputs.
You have to delete the Key macro step if you need to change it, which will also erase the label, you can put in four steps in the key macro,l works on any button.
cb1