Newbie Question - Upgrade MySQL (PLESK 7.5.3)

[robertjgarza]

We have a remote server using PLESK 7.5.3 but I need MySQL 4.1.x (or whatever I the latest stable version) and I would love to upgrade PHP too. I have read many horror stories about others messing up their systems so I am trying to avoid that from happening.

AtomicRocketTurtle seems to offer THE best hope of succeeding but I want to make sure that I am on the right track.

It seems that I need to go to the shell prompt (I'm using Putty to connect), login as the superuser and issue the command "yum install atomic-psa" to get started.

But then what????
I see talk about RMPs but where to they get copied?
Does the PLESK Updater take over after that??

Does anyone have (or point me to) a document or series of steps that would tell this???

Looks like I have Red Hat Enterprise Linux v3.1 and here is some of the info:
psa 7.5.3-rhel3.build75050506.13
httpd 2.0.46-46.2.ent
bind 9.2.4-7_EL3
courier-imap 3.0.8-rhel3.build75050506.13
mysql 3.23.58-16.RHEL3.1
php 4.3.2-24.ent
mod_python 3.0.3-5.ent
psa-migration-manager 7.5.3-rhel3.build75050506.18
psa-qmail 1.03-rhel3.build75050506.13
psa-qmail-rblsmtpd 0.70-rhel3.build75050506.13
psa-proftpd 1.2.10-rhel3.build75050506.13
psa-logrotate 3.7-rhel3.build75050506.13
psa-spamassassin 7.5.3-rhel3.build75050506.13