Modify Capitalisation of Just Part of Filename

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Hi Leo.

Thanks for your quick response. I couldn't reply back until now.

I'll see if I can teach myself how to do that.

Presumably the best places to start learning are here:
https://www.gpsoft.com.au/help/opus12/Documents/Scripting/Rename_Scripts1.htm
Here:
https://www.gpsoft.com.au/help/opus12/index.html#!Documents/Scripting/Example_Rename_Script.htm
And here:

Rename scripts in JScript, VBScript and PerlScript

Updated Aug 29, 2017, for Directory Opus 12. You do not have to use scripting to batch-rename files in Opus. You can use simple wildcards, find & replace, regular expressions, and so on. Rename scripts are just an option for when you need more power…

[?] Would you recommend VBScript for this relatively simple objective?

If I get it to work, I'll post the result back here.

Thanks for you time.