thanks again, i've always tried to solve the problems alone, but with the help of
got the file and installed it. Meanwhile i've also tried with AppleOnboardPCATA.kext. each and both files give the same result:
I booted with -f -v
all the verbose lines run

and then i get a black screen with the cursor, that changes into the spinning coloured disk when de hd works.

Then i wait for long time but it continues to load things on the hd and i can't go on..
there is no request for username, and registration. The background remains black.

anyone with this problem?