All i can say is usually when i need to use Lookup Table, i store them in a external EEPROM, using Excel or whatsoever else custom program make life easy. Well case by case i guess. I try to keep codespace for what it's suppose to be used... code.

What PIC do you plan to use? Any 18Fs? if so there's already some built-in TABLR plah plah stuff.

I already do have such application .... LOL !!! May be I'll post you for a barrel of Maple syrup or two ...
Hehe they're still some available 'round here. The best time is always in spring... after that it's mostely called Sirop de poteau