Hi guys

Today I'm trying to build my own Odoo templates but I'm stuck on one thing.
I've started from the Quotation template code but I soon ran into some problems. With the Quotations template you can't make any productlines without a product name.
So now I'm wondering how I could add a product without a name. (in other words, unreferenced to a product)

Without using my Quotations template I can do this:
http://i.imgur.com/GvicVk9.png

But with the Quotation template I have to fill in a name. See this:
http://i.imgur.com/Od6pzMe.png

This is my code:
        template = self.browse(cr, uid, template)
        order_lines = template.order_line
        for line in order_lines: 
            vals = line_obj.product_id_change(cr, uid, [],
                pricelist = pricelist_id,
                product = line.product_id and line.product_id.id or False,
                qty = 0.0,
                uom = False,
                qty_uos = 0.0,
                uos = False,
                name = '',
                partner_id = partner_id,
                lang = False,
                update_tax = True,
                date_order = False,
                packaging = False,
                fiscal_position = fiscal_position,
                flag = False)
            vals['value']['discount'] = line.discount
            vals['value']['product_id'] = line.product_id and line.product_id.id or False
            name = line.name
            if name == "" or len(name) <= 0:
                vals['value']['name'] = "Unreferenced Products"
            else:
                vals['value']['name'] = line.name
            vals['value']['state'] = 'draft'
            vals['value']['product_uom_qty'] = line.product_uom_qty
            vals['value']['product_uom'] = line.product_uom and line.product_uom.id or False
            vals['value']['price_unit'] = line.price_unit
            vals['value']['tax_id'] = [(6, 0, [x.id for x in line.tax_id])]
            lines.append(vals['value'])
        result['order_line'] = lines

Could anybody please tell me how I could add lines to the templates / quotations without needing to supply anything in the field 'Product'?

Any information or help is much appreciated!
Yenthe