asterisk users - Aug 2006 - newbie - suggestions on installing Asterisk for SOHO

Hi


can anyone suggest the best way to go about installing Asterisk for a small
business of 20 - ive read all the documentation but the real issue is the
dial plan.  Ive attempted to write my own which is similar to FreePBX's
dailplan.  Ive even attempted to rewrite dialparties.pl simply to increase
my knowlegde of dailplan writing.  The issue i have is all the functions
that come with freebpx are they all necessary.  

If so it look as if i will have to opt for freepbx though i would rather
continue from the bottom up and delevope my own system.  Point is at this
moment is hunt groups is this a feature i should use or can i dismiss. 
Reason for asking this is because i dont yet know perl or php so how can i
iterate thruogh a hunt group checking for CW CF CFB etc.  Thats the point
in a nutshell