CSS Oval Buttons - How to center?

I have downloaded and setup your Oval Buttons per your examples from http://www.dynamicdrive.com/style/cs..._oval_buttons/ .
However, I can't figure out how to center them on the page or within a Table TD. It appears that the buttons always display on the left of the page because of the float attribute. Is there a way to make the buttonwrapper shrinkto fit and centered or some other solution to center the button on the page?

Can someone please help?

Thanks in advance