Help with Kubric scheme

I’m not sure if this is the right place to ask this, but here goes:

I’m using the default Kubrick scheme, but I would like to put some images and texts to the left margin area (not sidebar on the right). How do I do this? Is there an easy way to do this?

Also, similiar question is how do I put the piece of html code (for example Adsense) into the left margin area?

Thanks for your help!