Order of installation

[Steve H]

Background:
The Unix server on Apache already has MySQL 3.23 and PHP 4 installed. I've never used MySQL, so there are no tables at present.

Problem:
I need even more basic steps to upgrade 3.23 to 4.0 than the Reference Manual gives. (I read somewhere that I cannot upgrade directly to 4.1.) I expect to use the FreeBSD 4.x (x86) version. Would the following be the steps I take in order? If not, how should the order be corrected?

1. Download the FreeBSD software to my Windows XP computer.
2. Create a /mysql4.0/ folder in the same Unix server directory as the current /mysql/ and copy the downloaded file to the newer folder.
3. Using my Putty program, do a vinstall mysql (in the newer folder) to install the newer version in this folder. Am I supposed to stop the earlier version first? If so, what command do I give for this? Once the new version is installed, may I simply do a Remove of the earlier version's folder?

I think once these steps are taken, I'll be able to follow the steps in the Reference Manual. Am I right?

Regards,
Steve H