Ok, i made a quick search and couldn't find anything about this. I noticed that you can drag&drop a file from windows explorer to the Rapid PHP stage, and the file will load. But if you try to drag & drop a file from the filebrowser it's disable.
IMHO when you create a file browser it should be able to do things as if you were working directly on the OS file browser system. ( i know it can be opened with rightclick menu)
I read a post of someone asking about the F2 (rename) feature, that's also included in my suggestion.
thanks.