Abandonio ,I'm sorry i haven't checked it at first just now.The link is probably dead.Maybe you should consult
s1fw cause it's his site.Your firmware can be found here
www.s1mp3.net but it can only be downloaded if your registered in that site and has an account.I'm afraid i don't have an account there and still theres a difficulty in registering cause one reason is its in
Chinese language.Wish i could help you with that,I'll try to find your firmware somewhere else.Still you should consult
s1fw,hes the guy you know.