Ok there it is.
In the components\com_comprofiler\comprofiler.php file
Replacing this
Code:
case "done":
break;
by this
Code:
case "done":
echo 'test';
break;
and the blank page is displayed with the message on top of it and the string 'test' in its content.
Easy from now to define an _UE variable with HTML code in the language file and display it with the echo statement.
Maybe an other solution exists, just let me know.
Hope mine helps
Bodhi