thanks for the reply.This does most of what you want, except replace '_' with ' '
http://www.febooti.com/products/filetweak/members/case/
I've been using it for years, its free
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My 2 €'s on enhancing X2's rename - I use 4 'file system' renamers - BRU, Febooti, Shelltoys, and X2 and the rename facilties in- FastPictureViewer for images and Calibre for eBooks - I would not expect X2 or any other file manager to cover all those bases.
@Disk Golfer - have you considered using Calibre to manage your Ebook Library, its free, highly functional and is under continuous development. Well worth the (un)learning curve. Has a very helpful user community. Bug fixes and small enhancements are typically done within 2 weeks - with early release to the 'initiator'. Runs on Windows, OS/X & Linux - supports dozens of eBook readers and formats.
I downloaded the febooti program and it seems good but I'm unable to get it to work. I have tried it on a Windows 7 64 bit and a Vista 32 bit machine. It installs and when I right click and choose "case" I get the dialog but when I choose any case, the "apply" button never activates and when I click "ok" nothing happens. I assume it's an administrative rights problem.
I have been using Calibre and love it but unless I'm missing something it does not change the case of multiple files and folders regardless of if I wanting to add them to my reader or not.
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For now I reinstalled a free 60 days version of directory opus to use for case changing . I will still try to get the febooti program to work.
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I know it might seem odd for the Mod to download a competitors program... I suggest downloading a trial version of directory opus to see how nice this one feature is.... no leaving your directory and then searching for it a third party program, no script writing, no dragging... just highlight the files and folder and click to change.