hmm.. thank you for your quick response, much appreciated, but unfortunately they don't work (message about not valid code appears). Could it be possible that for polish language (PL) version of WOW they can not be used? or the way of generating codes are different?
I followed instructions from Video WoW5.0_activation_registration_EN.avi movie. Unfortunately not all options all available for PL language - for example there is no WoW! Pro on a list, but there is WoW! PocketPc and I can past a key for it which don't work. Maybe choosen language is a cause...