I'm trying to make a form, where I can have an image next to it. So it look something like this
___________________
| |
| Content/text |
| |
| Form | Image |
| |
| |
___________________

I understand how to change the layout for custom pages (like it's showed for the custom home page) This is made by creating a new type of page and making a new layout. But when it's time to make a custom form I don't know what type of code should I use to make it as form-type.

For normal pages we use

class HomePage extends Page {

}

class HomePage_Controller extends Page_Controller {
}

Do I have to use something else for the extend part, instead of Page or Page_Controller?