4
If you want to edit the layout of your site (header/footer), you'll need to edit the theme.html for the theme(s) your using. I assume you know html, so I'll leave it at that.
Then you'll need to do the stuff on this page:
https://xoops.org/modules/smartfaq/faq.php?faqid=201To create a block with a picture, go to Admin page > System Admin > Blocks
Scroll way down
Choose block type: Left, Right, Middle, etc
Weight, which is relative to any other blocks in have on the page.
Which page(s) people can see it in.
Put a title
then the code
If you want to cache it to save MySQL queries, then do so.