default debian packages?

[John G. Heim]

Anybody know how I can install all the same packages that you get with a 
default debian install? When you're installing from a debian CD, it asks you 
if you want to install categories of packages like a mail server, file 
server, etc. But by default, only 2 things are selected, the base system and 
the desktop environment (I think). But how can i get all those same packages 
into my fai install?