Bonjour Castor
I wonder if you mean Favicons ( the icon on the address bar in IE which is customised for the particular web site )
The favicon will be in C:\Windows\Temporary Internet Files\Favicon.ico
Copy and paste the favicon to a new folder that you have created C:\Windows\Favicons, and then edit the URL and change the icon.
You can do this for all or any URL.

Salut Ipl...Maybe you will translate this for me !
Merci !

Krystyna