Why specific "print * =" commands?

[Steve Snyder]

Occasionally when people post their smb.conf files I see that they have 
defined specific printer handling commands.  My question is: why?

My experience (on a LaserJet /w JetDirect card) is that print jobs work fine
without defining specific print command.  My server is Linux-based (RedHat 
v4.2) and my smb.conf defines:

[global]
   printing = bsd               
   printcap name = /etc/printcap
   load printers = yes          

[printers]                 
   comment = All Printers  
   path = /var/spool/samba 
   browseable = no         
   printable = yes         
   public = yes            
   writable = no           
   create mode = 0700      

So... what's the benefit of defining specific printer commands?

***** Steve Snyder *****