Newbie install/upgrade question

I just got a DELL PE 2400.
I was planning on trying to install * this weekend.
I know the *@home install would be easier, but how do you upgrade when a new version is released?
Is installing from *@home, any different than installing Centos 4.0, and then installing Asterisk later?


I guess it was a stupid question.

I am going to install Centos and then install Asterisk.
It’ll be harder, but I would like to learn the ins and outs of setting everything up.