You will most likely have to use FQL to perform the initial PID search...then batch the pids and request urls. The following FB docs pages have further information:
photo
photo_tag
These requests would be necessairy:
SELECT pid FROM photo_tag WHERE subject=$uid
and
SELECT src, src_small, src_big FROM photo WHERE pid=$pid
you might be able to combine them into the following...
select src, src_small, src_big from photo where pid in (select pid from photo_tag where uid=me())
The final execution would look something like this:
Facebook.fqlQuery
(
"select src, src_small, src_big FROM photo WHERE pid in (select pid FROM photo_tag where uid=me())",
facebook_photosHandler
);
I believe extended permissions are required. Each of the pages above should list permissions reqs for performing these FQL queries.
Best of luck.