While i was looking for Laurent's email address in the devinfo ML, i found one of his lasts messages (unfortunatly, i didn't remembered it yesterday) in which he says he added the exif support in its last version.
I modified the script
php4.3.9-upgrade.sh and replaced all calls to
php-xxx-4.3.9-1ld.i386.rpm with
php-xxx-4.3.9-3ld.i386.rpm.
Of course, it works perfectly !
Once again thank you very much, you two, for this good work.