Don't make changes in HTML pages after export - you will lose these changes every time you re-export!

Instead, make changes in template code (.DAX).

Start Template Editor from OrangeCD folder and load CMI template. Switch to Start page tab. You will see that it looks a lot like HTML code - and you should be able to add your header pictures and sidebars right into the template code (just like you would into HTML page).

Then make sure to save the template into a separate file, so you don't lose it when you re-download original CMI template.

Andrei