pre-existing PHP application

"EMANUELE PETRI" <[email protected]> Tue, 1 Mar 2005 10:54:05 +0100
Newsgroups gmane.comp.sourceid.sso.user
Message-ID <[email protected]>
 Hello all,

just a question...
how can a  pre-existing  php web application became a sourceid service
provider ? first of all.... is it possible without migrating all the
application ?
in the documentation it's written that SourceId is intended to be
co-deployed....

if anyone has already done the same , please let me know.

Best Regards,
Emanuele Petri