'Many' packages installed - CentOS 4.1

[tom.brown at goodtechnology.com (Tom Brown)]

> I do a minimal install, then install the packages(httpd,mysql,php,etc)I 
> need.  Never ran across a problem with it installing X when I didn't 
> want it.

OK just got to install another box but there is no 'minimal' option -

I have

Personal Desktop
Workstation
Server
Custom

What ISO's do i need to download to be presented with a 'minimal' option 
? Or is there a switch at boot or something similar?

thanks