I'd like to know if it is possible to create a "You might also be interested in..." box below the product instead of the "Customers who purchased this also purchased..." because my 'site is for high price, low quantity goods, namely jewelery.

Second, I'd like to know how to add a random picture in the center column of my homepage.

Third, if it is possible to show the products in two rows instead of one when browsing products

I'm relatively new to this, so i appreciate any feedback
Thanks