As long as it's going to help others... I don't mind posting some specifics:
Here's what I have:
psa v7.5.4_build75051014.16 os_RedHat 9
OS Linux 2.4.20-021stab028.17.777-enterprise
How can I tell if I can support RPM? That would be "yum" ? Which mine does NOT support. Can I install that without breaking plesk?
The only RPM distributions I see at:
http://dev.mysql.com/downloads/mysql/4.1.html
Are for Enterprise 3
What would you recommend for my system?
Also - I notice you say to backup the databases. Do I need to restore them into the new MySQL 4?
What if it doesn't work? Can I roll back?
Thanks for any and all help. I'm a little bit of a newbie at server administration.