All the recent talk about the legality or illegality of wiring modifications has gotten this newb very worried about what exactly is acceptable.

I was planning to run an additional fuse block/relay to provide constant and switched power for things like the data logger, shift light, etc. and keep the wiring clean, but I wanted to confirm that this is legal. To get an idea of what I'm thinking, please Google "Painless Performance CirKit Boss" (unfortunately I can't post links). Thanks!