rainbow LEDs are 5mm. the first thing im gonna try is a set of controller ports. i have no idea what kind of behavior the light has, so im wondering if multiples stay in sync or not.
as far as the slim box compatability,
short answer:
yes
long answer:
the chip form is cut in a shape that allows you to intall flat on the motherboard without a proper pinheader.
drive check is just a bios option.
bios patching is a breeze, and flashing a white duo is even easier.
the flashbios bank supports flashing from HD, optical media, and (my favorite) network. it runs a webpage interface that you can log into and flash from your web browser. just pick the file on your computer (or NAS).