This page contains my idea for extending Total Commander's functionality which (I hope) will be implemented someday.

First try to do something like this:

1. in usercmd.ini file define section similiar to:
   

   [em_test]
   Menu=test
   Cmd=D:\picture.jpg
   button=

2. assign em_test to notepad alias

Now, writing notepad in command line will give You picture preview. Before 2nd step: typing notepad was giving notepad application.

My proposal is that TC should check for existing Windows aliases and give a warning about overwriting it.

Or maybe give alternates:

1. warning dialog with assign / change alias / cancel buttons
2. assign alias to TC but give Information about possibility of executing system registry alias via Shift+Enter (this should be implemented)