You can easily disable the rotation functions if you do not need them (honestly, it's better to use a dedicated image editor for such operations, esp. one that is capable of lossless JPEG transforms and which allows you to decide what to do while rotating images with partial MCUs). Just download ShellExView, run it, search for Windows Photo Viewer Image Verbs and disable the context menu entry.
Now unless something else decides to steal N, you'll be free to open Send to via a single keypress.