how many space takes data-data selfboot method?
 

and is there a list of releaes which aren´t possible to
selfboot with the echelon method cause the image
is too big ?

Echelon's method takes about 25 Mo, Bin2Boot take less (about 20 Mo).
The only game I know that is to big for Echelon's method and that has no "downsamplable" files is "Maken-X". I managed to selfboot all oher games except Perpetual Blue, but it's no question of space.

is it possible to self boot sonic adventure?

i used bin2boot however when i use disc juggler to burn it it gets near the end and fails it...any idea?

Of course it's possible.
If I can remember, you have to delete the file containing the japanese voices. You don't need it anyway. Then you'll save enough space to burn it selfboot.

your the dude, any idea what file the jap voices are saved in?

"EVENT_ADX.AFS" if my memory works.

looks like you got a sharp mind, now time to get sonic done