Create alias for apache

hi all,

Iam running alot of site on ISPconfig, but for all the sites, i need to create a alias like:

Code:

Alias /common/ /export/common/
   <Directory /export/common/common>
      Options Indexes MultiViews
      AllowOverride All
      Order allow,deny
      Allow from all
   </Directory>

This is for ALL the sites atm, and in the future, is there any way i can add this to apache2.conf?

Thnx in advance

tijn