Next up is how to make the choice in the s-s. I'd like to make it so that you have to press a button within a certain time frame or else the system defaults to P96. You have to press a key or mouse button to boot CGX.
There are dozens of s-s selector utils at Aminet, one of them is my
Kill68k which I wrote for easy MorphOS booting but is also suitable as startup-sequence selector.