Structures_DataGrid_Renderer questions

Hi I have 2 questions: 1. After installing SDG in my php/PEAR dir, the examples worked fine. However I am developing an application that will be hosted so I want to have a PEAR directory inside the web root. I have created an .htaccess file with the new include path. It seems to be working fine for other PEAR packages. The problem arises when I use SDG. I have created a custom class which extends SDG. After getting the dataset (which I've confirmed) and the script gets to $db->render(); I get the following error: Fatal error: Call to a member function render() on a non-object in c:\wamp\www\aaa-myownproject\include\PEAR\Structures\DataGrid\Renderer.php on line 69 The problem occurs regardless of the renderer chosen, eg default and/or xls. 2. I want to output to Smarty but am not sure what I need to put in the template to tell SDG where to output the grid itself. I assume there is some Smarty syntax, eg {datagrid name="mydatagrid"} or some such. Please advise. All asisstance very welcome. Regards Prue