Yea it's really weird too. Because it's an "add at line" to the main file, not replace it or anything. Don't know why it's stuck like that. :/
However, for the idea of using constants along with this one, my best suggestion is to load up my mod here play any race, get your preferred race, save as soon as you can, then change load order.
While this any race mod would be compatible with any other mod... This kind of makes a problem with other playable races. lol :/ (Being to start as said race, etc...)