Hi Forum.
the module most add some fields to product.product normal view. i coped the dir to /usr/lib/pymodules/python2.7/openerp/addons/sol_products
are the modules dos not shown in the module list. (installed Modules, apps)
__init__.py
   import sol_product_fields
__openerp__.py
{
    'name': 'Sol Product Fields',
    'version': '1.0',
    'category': 'Product',
    'description': "This module will added some spacial fields to Products View Form, and remove the EAN13 Barcode",
    'author': 'xxxx',
    'website': '',
    'depends': ['base'],
     'demo': [],
    'update_xml':['update.xml'],
    'installable': True,
    'auto_install': False,
    'web': True,
    'js': [],
    'qweb' : [],
    'images': [],
    'css': [],
}
sol_product_fields.py
  from openerp.osv import fields, osv
class product_product(osv.osv):
   _inherit = "product.product"
  _columns = {
            'product_category' : fields.selection([('MCB','MCB'),('Switches','Switches'),('Recepticals','Recepticals')],'Pruduct Category'),
            'corve_ka_rating' : fields.selection([('3kA','3kA'),('6kA','6kA')],'Corve kA Rating'),
            'corve_Pole' : fields.selection([("Pole 1","P1"),("Pole 1+N","P1+N"),("Pole 2","P2"),("Pole 3","P3"),("Pole 4","P4")],'Pole'),
            'corve_current' : fields.selection([('10A','10A'),('16A','16A'),('20A','20A'),('32A','32A'),('40A','40A'),('50A','50A'),('63A','63A')],'Current'),
            'corve_hugh_code': fields.char('Corve Hugh Code ',size=32,required=True, help='Imput Hugh Code'),
    }
product_product()
update.xml
    <?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
        <record id="sol_product_normal_form_view" model="ir.ui.view">
          <field name="name">product.normal.form</field>
            <field name="model">product.product</field>
             <field name="inherit_id" ref="product.product_normal_form_view"/>
               <field name="arch" type="xml">
                  <field name="list_price" position="after">
                    <field name="product_category"/>
                    <field name="corve_Pole" attrs="{'invisible': [('product_category', '!=', 'MCB') ] }"/>
                    <field name="corve_current" attrs="{'invisible': [('product_category', '!=', 'MCB') ] }"/>
                    <field name="corve_ka_rating" attrs="{'invisible': [('product_category', '!=', 'MCB') ] }"/>
                    <field name="corve_hugh_code" attrs="{'invisible': [('product_category', '!=', 'MCB') ] }"/>
                  </field>
               </field>
          </record>
        </data>
</openerp>
