Pretty simple I think. My low tech version would set up two instances of OAV2 in your htdocs folder and configure each separately. Create two OAV2 MySQL databases and configure the separate database.php config files to each point to the proper database.
Use
http://YOURSERVER/oav2_prod/index.php or
http://YOURSERVER/oav2_dev/index.php to access the proper OAV2 or use hostheaders to have separate YOURSERVER's without the oav2_XXX stuff.
Make sure to update the URL setting in each of your audit_windows.vbs files and you should be good.