I see

i put them in the usermod/maps folder, and it works, don't know why with a custom folder it didn't worked

No.
.bsp files go with .bsp files

cause i found all other default map as the "stage.ain" inside, should i didn't put them here ?

Why did you put them in "graphs" for...?

i tried to put them in usermod/maps/graphs, but nothing happen when i launch them

Then I don't know why you're having such problem, given I never had it before.
Did you try to put the maps in the "usermod" folder?

to resume, i did:
SourceFilmmaker/game/custom_maps/maps/ and there i put all the .bsp

wdym ? i created a folder named "custom_maps" in the game folder. i created another folder "maps" where i put the .bsp inside. did i missed something ?

Sounds more like you're just learning about SFM

hi, i downloaded the .rar, put them in the folder, i found them in the search windows but i can open none of these map, nothing happen, it let me to the black screnn with the red "no map loaded". Do you know what i should do ?

Whenever I open SFM i immediately check to see if you posted another map pack. Super happy to see you posting more :-)