[CentOS] yumex questions

I am looking at yumex on my toshiba, trying to create a kickstart for 
my hp.....

What is profiles?  Is it possible to build a list completely of 
install, ignoring the current install?

Again, I am trying to help myself along with kickstart.  And how do I 
tell what is just installed without having to be selected?

So I do not see freeradius listed not in the update selection nor the 
install selection.  A rpm -qa|grep radius shows freeradius installed 
on the toshiba.

It would be 'neat' of kickstart config could take advantage of yumex....