DMZ 1.7.1 (DataMapper OverZealous Edition)

[eluser]introvert[/eluser]
Hello.

I have a question regarding DMZ htmlform extension, which I know its not supported anymore but I'm stuck with it.

I want to display a model form which has a related model and it's field is displayed normally with the listing of all items.

Form name:
some field
some related model field (select box with items: related 1, related 2, etc.)

I want to add option for "None" => 0 selection to it and I have no idea which would be the proper/best way to do this.

I know about defining function get_htmlform_list in the model class but this wont return any array of data which I could manipulate to add the desired option/value.

Is there any way to do this with the least effort/changes?

Many thanks in advance.