What is AceACL
AceACL is a flexible and powerful Joomla Access Control component with an easy-to-use user interface that provides the ability to set all front-end and back-end permisions from one page and to assign any user to multiple groups.
AceACL is an advanced Joomla ACL manager that offers you to set User Based Permissions, create unlimited groups and manage all rules for your Joomla site so it makes it easier to work with the Joomla ACL system.
With AceACL you will obtaign a more advanced Joomla Access Control in Joomla 1.5 than what offers the core Joomla 1.7 ACL.
AceACL can be installed or remove without changing the core files or database tables of Joomla (hack-free solution).