How do I change the default image that a browser (ex: the logo e on IE) shows on its tab for my sharepoint site with a custom image. I understand it should be 16*16.
But where exactly should I be putting the image?
You'll need to drop a small favicon.ico file at the root of your web application within IIS (next to the web.config) or edit the master page to link to your custom file if it's host somewhere else.
A good tutorial on this can be found here : http://blog.tedpattison.net/Lists/Posts/Post.aspx?ID=8