v. 2.0
-(Changed) Incompatible with previous versions of itself.
-(Added) 10 extra slots for a total of 40 available.
-(Added) The use of a customizable Hotkey. Can be used in conjunction or as a replacement for the spell.
-(Changed) Tagging visuals that were bright blue are now a subtle dark red.
-(Added) Some audio cues to inform the player if trying to tag while in tracking a single npc, or if the tracking slots are filled.
-(Changed) MCM menu layout
-(Changed) Completely redid the scripts. Cut out several thousand lines of non-essential code and streamlined it quite a bit.

Enjoy and happy modding.

-Mush-

http://www.nexusmods.com/skyrim/mods/25554/?