I have installed Opencart 2.0.3.1. vqmod 2.5.1.5 for Opencart, vqmod manager 3.0, and ProductQuestionsAndAnswers_v1.8.2_oc2.0.x.x
These have all been uploaded manually via ftp, i've followed the simple instructions for vqmod's installation to rewrite part of the index.php and admin/index.php which seems to have created all of the required cache files.
The module is installed, enabled and visible in the modules section and in the vqmod manager, however when I try adding the module to the theme layout there is no option for this module.
Everything appears to be working fine other than for not being able to insert the module into a layout.