System Requirements
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ISPConfig >= 3.0.3.3 required.
PHP >= 5.3 recommended.
PHP-Curl extension.



Installation instructions ISPConfig Billing module
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1) Upload the zip file that contains the billing module 
   code to the server and unpack it.

2) Enter the billing directory:

cd billing

3) Execeute the install script as root user:

php install.php


4) The next steps have to be performned in the ISPConfig Controlpanel interface.

Login to ISPConfig as admin user, go to System > CP users > Edit User.
Click on the admin user, enable the "billing" checkbox in the "Modules" settings
of the user and click on save.

Click on Logout in the upper left corner and then login again. The Billing module
will show up in the upper menu.