If I am to understand you correctly you would like to create custom button and then be able to have those selected in bullet style format.
My work around for this is to create all my menus including any images that I’d like to use as buttons. You cannot use a graphic or a text in Architect as a link. But you can import your background image for you menu and have it display exactly as you’d like.
I just finished a video where I wanted each scene selection to fly in and then have my “button” pop up after each line. In this case it was a baseball.
I inserted a button from the menu then using the crop function dragged the ALPHA slider to 0. (You don’t want their button to be displayed.) Then I selected “underline” as my highlight choice. Now your image will appear to be line selectable. If you want a bullet style then just resize the highlight line to the width, height and length that works. Another thing to consider is the “Button Order”. What that does it automatically highlight the first choice on page load. There is no way to not have the highlight show on page load, (At least none that I know).My menus had a lot going on and I did not want the buttons or the menus to show before the sequence had finished. It took some time but it makes it look more professional. The program is weak on control over buttons and such so you have to be creative.
I hope this helps, if I have skipped some steps or lost you please just ask. I’m not aware of your level of skill or maybe I am just missing the point all together.