clarifications for openoffice3/MESSAGE ?

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

I just installed openoffice3 and the +DISPLAY told me "Before using this 
package for the first time, each user has to run a setup program, which is 
automatically invoked at the first start."

Where is this "setup program"?

And do I need to run this if I was previously using openoffice2?

Also the MESSAGE mentions "platform dependent extensions" -- I don't 
understand from reading this why I would do this. I have no idea what this 
is. From first reading this I thought "extension.oxt" was the actual name 
and that I need to do this to enable the now-installed extensions.
Maybe it should also say "... a third-party extention, for example:" (Or 
"arbitrary"?)

And where is the "Extension Manager"? How do I run it?

  Jeremy C. Reed