Well I was developing the search site further today and decided that their will need to be ads on it to finance it. but i really dont want just any old ads (like google do) so I had to work out a way to do it.
The way I found was quite simple and most of you will quite like it (i think)
I will just link to the site page in question instead of remaking it.
However it is a good ad rotation system allowing you to set prices and periods etc.
http://www.tech-evangelist.com/2007/08/03/php-banner-ad-script/