Toggling start-up services

[Gabriel Dragffy]

Have setup a LAMP Gutsy server. I don't want MySQLd to get auto- 
started on bootup, just when I like using '/etc/init.d/mysql start'.  
How can I go about disabling it from automatically loading during  
bootup, and should I want to - how would I re-enable it again? It  
doesn't help much here but I hope it is as easy as on FreeBSD where  
you simple edit rc.conf and change mysql_enable="YES" to NO. What's  
the deal with Ubuntu?

Many thanks

Gabriel