Replace default notepad

 There is a little trick to replace windows' default text editor to anyone.

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad.exe]
"Debugger"="c:\\Program Files\\EmEditor\\EmEditor.exe"

There is only issue with this:
because of the Debugger string purpose of set up a debugger application the notepad called with the following form:
c:\\Program Files\\EmEditor\\EmEditor.exe c:\\windows\\notepad.exe
So in emeditor always try to open notepad.exe too.

So better alternative use the http://www.binaryfortress.com/notepadreplacer/
or you have to write a wrapper exe.