I tried again with special victory conditions and... it's working! They spawn in the provinces i specified etc.
Maybe i did something wrong the last time and didn't checked enough, i supposed the nations should appear in the "choose participants" screen with the good AI level already selected etc. So i have supposed my commands were wrong

This time, i selected them in the list, and it looks like it's OK.
Btw, insted of alliance i should say NAPact, if i remember well alliance is not possible, isn't it?
Thx for the help Edi
