I dont think that selecting everything from one file and pasting to the end of a valid cartographer_questobjectives.lua file will work ...and copy/paste of parts is error-prone and will definitelly will lead to double records.
but just an FYI i been useing MobMap for a while now and it's got a bigger database and also has other cool bells and whistles. you can get it from http://mobmap.de and their dev blog is here: http://www.mobmap.de/devblog/
there are 2 different language versions of MobMap. 1 German and 1 English
The MobMap Addon is an ingame database browser. It displays the positions of all known mobs and NPCs on the ingame map as well as the minimap. It also integrates itself into your questlog and finds the positions of quest mobs with just one click. And it does even more: it allows you to search the MobMap quest database, the merchant database and the recipe database.