Hello papakidza,
Stop it, the product Opel Tech2 Laptop based is not good product for professionals, i tried many products such as (Tech2, Opel Scanner, Opel Immo, Etc...)
The best product is OP-COM, you can find this product at OBD-Factory website but remmember (it is not original) but working perfect.
http://www.obdfactory.com/product_view.asp?id=378
Actually all the above products are available also there, but believe me, op-com is the best.