Feature possibility?

Nothing is stopping you from creating a new palette. In the same customizing menu that you used to customize the Popup menu, you can create a new palette by clicking the + under the palettes list, and a new palette will initiate under “Modified Palettes”. Then drag your favorite icons into the right/top window.
Give the new palette a name that you like:

and refer to it in the alias command macro:

And as I explained above, if you have a multi-button mouse, you can also assign the macro to buttons 4 thru 12.

Max.