If you seldom use Emacs it is easy to forget the arcane operation of Emacs...
Ctrl + X Ctrl + C.
"M" is effectively "Alt" (on most systems).
Thus M-x means Alt + X.
"C" is effectively "Ctrl" (on most systems).
Thus C-x means Ctrl + X.
Creating/locating the settings file
Alt + X customize. Press "Apply and Save" (Emacs 24 for Windows). This will create the file ".emacs" in C:\Documents and Settings\username\Application Data or C:\Users\username\AppData\Roaming depending on the Windows version.
Locate it by: Ctrl + X D ~/ Return
Add modes/Elisp code
<This section is under construction...>
Example: Add the Intel-hex-mode Elisp code
Download it and copy file intel-hex-mode.el to the same folder as file .emacs.
Add this to .emacs:
To open a file: Ctrl + X Ctrl + F Enter <Select file> Enter
To save: Ctrl + X Ctrl + W Enter y
Ctrl + X O to switch in split windows (e.g. after Ctrl + X B).
Ctrl + X Ctrl + B to get a list of windows (buffers).
Ctrl + X B to switch between windows.
To be continued...