So, here is my Import Notice :
1. Open World Editor.
2. Go to File (in the toolbar), then in Preferences and in the General tab, mark the compartment " Create unknown variables by pasting data release mechanism".
3. Open the map example supplied by the creator of the model of spell since World Editor.
4. Copy the Units, the Spells, the Effects / Buffs and Triggers bound to the spell one by one.
Tip: for a spell with several triggers, it is possible to put quite triggers in the same category and so to have only the category need to be copied/paste.
5. Open your Map since World Editor.
6. Paste Units/Abilities/Effects/Buffs/Triggers copied previously.
7. Repeat the stages 3, 4 and 5 until have copied / paste everything in the map, then pass in the stage 8.
8. Verify in triggers, if skills and units if ID of the spells / effects / buffs did not change a map in the other one (if the spells / effects / buffs are good). If they changed, then modify to put ID of the spell / effect / buff in your map (choose in the list ^^).
9. Put credits for the creator of the spell in your map. [Optionnal]