There seem to be enough "rocket scientist" (or rocket scientist wannabe) types asking for the feature, that you may be the b€n€ficiary for adding it.nikos wrote:i think it's easy for me to add regexp rename, but who will benefit? rocket scientists only

Myself, for advanced renaming tasks, I would prefer to use any of the more intuitive 3rd-party apps, preferring ReNamer for the nice way it integrates with x2 as a button on my toolbar.
[My opinion is that RegEx was useful long ago when all one had was a command line console interface for doing stuff; but nowadays it should be the choice of last resort when you have no other option. It is all-too-easy to specify something other than what you intend with RegEx, and there are so many much more intuitive options available. :shock: ]