b) install (and switch between) sdk 2.1 (since it is 2.4 by default and poclbm favors 2.1) to my persistent linuxcoin usb flash drive?
c) pop open all 6 of my poclbm or phoenix command line miners on persistent linuxcoin startup? It is such a pain to open up 6 miners using the start_mining script...
b) I didn't know this about poclbm. I run 6990 (needs sdk 2.4) on LinuxCoin and get better results on poclbm than Diablominer (close second) or phoenix (less close third). Are you sure poclbm prefers 2.1?
c) I'm way from LC atm but if you post this in the LinuxCoin thread someone will tell you the correct /etc file to put your startups in. I can write you a quick Bash script to go in the correct file, although if you've had any CLI experience in setting up LinuxCoin you might be able to do it yourself.
I know this isn't exactly what you wanted, but I hope it helps.