How to change single product page layout.

I'm having trouble trying to get the item description to show up below the main product image and not below the thumbnail preview.

Here's the link -

I've tried to create a div tag for the content wrap, but it pulls in all the content thereafter it.
I'm pretty sure I just need to step away from the computer for a few.

If I could help on this whether it be to look at an already answered post it would be of great help.