Accessing the yii framework on localhost

Hello, I’m very new to yii framework as well as zurmo crm. I have installed zurmo crm on my local machine lamp in ubantu 12.04. I got the yii framework along with zurmo installation. But I’m not able to access the yii framework on localhost. In fact i dint get “demos” and “requirement” folders within “yii” folder in “zurmo” folder path. Could somebody help me to access it on localhost? I have tried to open by: http://localhost/zurmo/yii/requirements/index.php It is showing the error: The requested URL /zurmo/yii/requirements/index.php was not found on this server.

this is correct because there is no “requirements” in yii folder which is in “zurmo” folder. What should i do now?