How to propperly push down a container?

Hi,

I have this page:
http://weinsure.nl/fcp/index.php/nl/

I tried several things to push down the grey blocks, but nothing seems to do the trick.

What is the best way to push the grey blocks 2/3 down?

How can I make the grey background a little transparent?

Thanks in advance.
All help is highy appreciated.

Cheers,

Hans