>kickstart
yup - you're right
>The Amiga custom chipset,
well, you cannot "copy" the chips, but as far as I understand you are free to reverse engineer them. E.g. without "looking" you can design chips that do the exact same job with the exact same pin-layout.
>68000
nop, Motorola still owns that design (and frankly... rev.eng is simply not worth it here)
>burn KS roms
yes/no... as I see it: if you have an Amiga 3.1 rom chip legally aquired, then you are allowed to burn a copy (with extra stuff) as long as you ONLY use either the original rom OR the new one in ONE machine.
Just my £0.02
Tom UK