well,
i have found that i can write something like this
BMAP* name = "filename#(x)#(y)#(width)#(height)";
to get part of a image file, but i need to make the cut on runtime, i cannot define all tiles this way, because i want to load de image on runtime (the player selects an image, and the the program loads it)

i found this function also: bmap_blitpart, but it is missin on the help files, so im not sure i can use it,
anyway, ent_clone keeps crashing, i dont know why