OCI Punchout free testing

Hello,

I am developing OCI-PunchOut support for an e-Shop and I would like to ask you about free testing environment for testing of PunchOut.

On the Trials and Downloads page (https://www.sap.com/developer/trials-downloads.html) there are many products to download but I do not know which of them is good for PunchOut testing.

Besides on this page (http://www.sapyard.com/minisap-installation-part-1/) is information that the free miniSAP does not contain business modules so I am afraid whether is the testing possible.

Could you please send me some link or practical steps to install Punchout-enabled testing environment?

Thank you very much for any information

Viktor