Customise Siberian CMS based on the Zend framework

Previous similar experience is must... I'm using the Siberian CMS open source software, which I have installed on my own server. This is basically a code-free, module based, drag and drop environment for producing apps. See [login to view URL] I now need to customise one of the modules (mCommerce) to suit my specific needs. Siberian CMS is based on the Zend framework (PHP) and MySQL. More details will be given to selected freelancer..