Change REST request response before it gets validated

I have tried using the submit listener and the requestFilter.afterRequest and I am aware of the script found here: http://www.soapui.org/Scripting-Propert ... ricks.html. The issue is that requestFilter.afterRequest gets triggered after the request is made but before the response is received. In addition, the SubmitListener.afterSubmit does manage to change the response content but the assertion does not happen and neither does the content in the response panel change.

If there is any way possible to change the response content or force the assertions?

Thanks
Al