I doubt he did....
The extensions that need to be loaded are either (or both):
extension=php_mysql.dll
extension=php_mysqli.dll
1 - Don't understand what you are trying to say here
PHPMyAdmin looks to see if the extension mysql is loaded before it does anything. It's a form of error catching. If it's not found it asks you to fix it. So you just need to uncomment that extension from the PHP.ini file. Obviously you found this because you have mysql running as per your phpinfo file.
2. php_mysqli.dll is not listed in the php.in to decomment.
Okay, so add it. As long as the dll is inside the extensions folder, you can add it and leave it uncommented. It's not an issue.
@:
What is your problem, that it's saying that you need to load the extension? Or that the extension you want to enable are not listed in the php.ini?