I have configured my CentOS installation with Apache with suPHP. It works very well.
But when I install PHPMyAdmin I get a permissions problem. 
Because PHPMyAdmin is located under /usr/share/phpmyadmin.
I do not want to use an extra vhost for every domain. 
I want to use an Alias on each domain to  /phpmyadmin.
What I must do to get it working?