To include this form of feedback in your website you need to do the following steps:
1. Register with OpinionLab
and download the script customized for you.
2. Unpack the onlineopinion.zip archive
3. Open the onlineopinion.zip\oinstall\include.txt, copy the content and place it in the footer of your website (you are able to change it in Administration->Settings of your PN website.).
4. create the onlineopinion directory in root directory of your website and upload there content of the onlineopinion.zip\oinstall\onlineopinion catalog.
5. point you browser to http://www.yourwebsite.com/onlineopinion/activate20.html and type in the username as you registered in with OpinionLab. By this time your password should be already in your mailbox.
That's should be it. When you open your website in the bottom-right corner you should see the [+] feedback sign. Everytime you want to see the feedback just go to OpinionLab
and log in.
Original readme.html file is included in the archive you download. OpinionLab claims to offer email support at firstname.lastname@example.org
Hope you will find it usefull.