Graphics for Website

I am putting together a hosted phishing simulator service (this is where people can test and educate there employees to the dangers of phishing emails) I have built the back end service and started putting the website together from template which I am happy with. However I need to replace the existing images that are on the site with ones that are relevant for phishing.

The dummy template page is up at http://www.phishfactory.com/site/

The images I need changed are the 3 sliders at the top on the home page and the large 3 boxes underneath and the simple how it works graphic at the bottom.

To give you an idea of what i need the service will be the same as
www.threatsim.com
www.phishme.com

Happy for you to have creative input as I dont really have any ideas as what would work. Just needs to fit with the exiting site,logo , possibly colour schemes etc unless there is a reason not to.

If you need further info please get in touch

Cheers

Paul