Batch Renaming Progrsmming

Hi

Well I would first find all the *jpg files you want to rename from the different directories using the program 'Everything'. It's very small, free and indexes hard drives in seconds. It can be found here

Secondly there are many batch extension re-namers out there. Here's  a free one that looks the one you could use.

Hope I could help?

--

Best Regards
Steven
Chigwell, UK