One thing I haven't seen mentioned on the various SuSE 10.1 threads - you'll get a blank page when you open zm.php if you don't have the php5_mysql and php5_mysqli packages installed. (Both may not be necessary, but when I put them both in things worked.)
The error message in /var/log/apache2/error_log was
[Sat Aug 26 18:13:37 2006] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined function mysql_pconnect() in /srv/www/htdocs/zm_db.php on line 21
[Sat Aug 26 18:29:09 2006] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined function mysql_pconnect() in /srv/www/htdocs/zm_db.php on line 21