XML Thumbnails in a grid?

What is the most efficient method for displaying dynamically loaded thumbnails in a grid? I have 29 thumbs and would like to display them in three or four rows by three or four columns and have them scroll/ slide left and right.

Can anyone share code that would make this happen? No fancy flyins, rollover effects or any other bells and whistles. Just thumbnails on a grid that can move left and right.

Please!