In VS I'm used to press Alt+A when replacing all occurrences. The rename tool requires Alt+R ("&Rename"). I believe Alt+A would be more natural in this case, so perhaps you should change it to "Ren&ame"?
znakeeye I am confused. Ctrl+Shift+H opens the IDE's find and replace in files dialog for me. In this dialog Alt+A is simply the shortcut for a button inside that dialog.
If you want to trigger the Rename button in the rename dialog then press Enter. That is one key press rather than two.