I have followed the steps on "Using a custom template" (http://doc.silverstripe.com/doku.php?id=form), but I don't know how to add the form to one of my pages.

I have tried placing $PatientForm in, [I had 'class PatientForm extends Form'] and <% include PatientForm %> but they didn't work.

You can view my code here:
http://pastebin.com/mb04aef1

Thanks,
David

Figured it out lol, it actually makes sense!

I didn't add this to my php page controller
function Form() {
return new CustomForm($this, "Form");
}