Vista made me a switcher

Just install the latest Version for 10.4, afterwards create a symlink:
sudo ln -s /tmp/mysql.sock /usr/local/mysql/mysql.sock

Then mySQL can be started or stopped with this command:
sudo /Library/StartupItems/MySQLCOM/MySQLCOM stop
sudo /Library/StartupItems/MySQLCOM/MySQLCOM start

A ps -awx | grep mysql should show this:
137 ?? 0:00.02 /bin/sh ./bin/mysqld_safe –datadir=/usr/local/mysql/data –pid-file=/usr/local/mysql/data/kulawik-nb.haj.kulawik.site.pid
189 ?? 0:22.95 /usr/local/mysql/bin/mysqld –basedir=/usr/local/mysql –datadir=/usr/local/mysql/data –user=mysql –pid-file=/usr/local/mysql/data/kulawik-nb.haj.kulawik.site.pid