Sliding header images problem

Hi guys, hope everyones having a nice weekend.
Ive been trying for a while but no luck.
Im trying to replace my home page header image with a slide show of several images.
Most slider plugins do have a php code that you put into the header.php file. But I cant seem to figure out where to put it.
I can see the default image in fire bug
<img width=”1000″ height=”288″ alt=”” src=”http://myrevive.co.uk/wp-content/themes/twentyeleven/images/headers/wheel.jpg”&gt;
but I cannot see it in the header.php file in the my child theme or twenty eleven theme even?

Please can someone help me and let me know what I am doing. All i want really is a simple sliding/fading images in the header section of the home page.

thanks in advance