First of all: create some image-columns in your db. (tutorial 2)
Second: add fieldtypes to the tab of your choice. (idem)
Third: use your js-knowledge (which I haven't) to create the header-rotator and call the images from the db. Just save this javascript into a regular .js-file
Fourth: Call the .js-file in the controllerpart of your .php-file:
function init() {
Requirements::javascript( "pathTo/myJSfile.js" );
parent::init();
}
If you need some libs like jquery, you can include them in the same way.
However: be aware that silverstripe might use the prototype and/or behaviour libs in the frontend. These might conflict and in that case you have to turn a lib off with Requirements::block("pathTo/conflictingLib.js");
Hope this helps