Re: Adding a Button
Do you mean a button widget? Or do you mean another menu item that looks like all of the other menu items, but is the first and is a link to Home?
If the latter, then yes. Just edit the menu (Admin -> Menus) and add a menu item.
If the former, then you need to create a new module that has this functionality. And put it as the top module in the column. This would work for vertical menus but not horizontal menus. If you wanted to do it with horiz menus, you would have to modify the tpl to add the button wherever you wanted.
gary