Nothing whatsoever to do with WD. You can get the scripts at Broadstairs - A Personal Perspective. There is a good tutorial on installing (if you get stuck with the included instructions) at How to setup jpgraphs and wxgraphs. Make SURE you upload the scripts in the same directory the arrive in ; /wxgraphs/. Don’t scatter them loose at the root of your server.
There are numerous threads on the forum about getting them working.