Device Files for Stratix II GX devices

Hi All

I am new to Quartus. I have downloaded and Installed Quartus II V8.0 SP1 Web Edition

For my project I want to use Stratix II GX ep2sgx90ef1152c3n device.

But when I try to select the device in the Quartus II I see a message "Not installed" written next to the device.

Can anyone please tell me where will I get the Stratix device files so that I can install them in the software? I couldn't locate it on the website.

Can a user install a device, after the software installation is done?

Thanks

Amey