Insert background image as textbox

Hi all,

I am having a very hard time setting these particular boxes (images) as background ‘textboxes’. I need to rebuild this website https://web.archive.org/web/20140125193014/https://www.nkg.com.au/ and I have completed most of it (check nkg.com.au ) however I can’t manage to get the last two paragraphs into boxes like that – I don’t even know where to begin. I’ve tried copying code several times but to no avail. If possible, is there a way to retrieve those specific boxes or will I have to recreate them in photoshop? I am still relatively new at this, so any help will be appreciated.