I would like to point everyone to this BE OPPID site. We cover customization, how to and variable explanations. A majority of the posts are word documents. Any improvements/enhancements/corrections (not that there are any mistakes :) ) will be review, applied and credited to the document!
Link to OpenPlant OPPID solutions
I have modified the link
Getting Access Denied when trying to get into above link, what is the process to get access?