PHP Thumbnail Gallery

I am a fairly new to php but have managed to build a site using php & joomla. I need help in creating a gallery page that will display thumbnails across the page as well as down ( 3 thumbnails across & unlimited down) It should be a simple job for someone who already has the code & I would be amending the code at a later stage adding hyperlinks etc. To see the work in progress please click here: [login to view URL] I would like to see links to similar pages that you have created before I consider your bid Thank you for looking