Replace function for custom commands

Hi

Would it be possible to add a simple replace function in the custom command dialog?

Example:

site search %REPLACE[%f,"_"," "]
site search %REPLACE[%f,".ext"]

The first example would replace all underscores with spaces, and the second would just remove ".ext" from the selected file/folder.

It could of course be expanded with regex-like functions etc, but the above would be good enough for now :-)

Can you please give me some additional examples of how this might be used for other commands. The only situation where this is probably useful is in the context you described which seems somewhat limited.