auto_append in safe mode

Hello, regarding multi-hosting of PHP, Safe Mode poses some delicate problems to solve. 1. One is that you cannot auto_append or auto_prepend a file that's not owned by the owner of the running script. Is there a way to circumvent that limitation or [sh][w]ould auto_* directives benefit from a special handling ? One solution would be to accept that a file owned by the server and called from the auto_*pend directives be included. 2. Another is that you cannot create/save files with your own UID/GID and need to chmod the files in order to manipulate them (write/delete). We're trying to find a (secure) solution to make Safe Mode accept script owner's UID and GID. Any thought, idea, comment, security consideration are welcome. hellekin