No worries, glad you got it sorted. As Spunkey said, the '.bx-wrapper' can be adjusted to get rid of the border and background colour. You might need to make your css selector for this in your main.css more specific than the existing .bx-wrapper to get it picked up because of the file ordering in your page. ".container .bx-wrapper" should be sufficient. To centre the images, you can target the ".bx-wrapper img" and, as they are block elements due to the existing .bx-wrapper img style, use "margin: 0 auto" to centre them within the container element. You could also chuck the box-shadow style into that same img selector if you wanted.
As a quick note, you've got a couple of failed image references on your page, one being the reason why the left / right controls on the bxslider aren't showing on hover:
GET
http://rdoyle.info/temp/css/images/bx_loader.gif 404 (Not Found)
GET
http://rdoyle.info/temp/css/images/controls.png 404 (Not Found)