Could you please help me?

Hi everyone,

I have a couple of questions,

  1. I am attaching my new company logo, Is it possible to separate the oval shape (which is the proper logo) from the white background?
    Unfortunately for me i am not literate in these things,although I love them and when i have the time I try to study them. But I have always found good help from this forum and I trust to have some more.
    2)What and how can I do to use the logo as a background on my site? www.diivino.com
    I would like it to cover the all center page.Is that difficult??

thank you for all your help
sorry I forgot to attache the logo…
thomas