Hi Nikos,
BridgeVIEW 2.0 runs the same version of G as LabVIEW 5.0. The LabVIEW 5.0 version of the application builder will operate under BridgeVIEW 2.0. However, in many cases a BridgeVIEW application can not be compiled into an executable by the application builder due to the interface with the BridgeVIEW Engine. There is an excellent KnowledgeBase article on the subject at:
http://digital.ni.com/public.nsf/websearch/6772c511e3cd5ed4862568d4005a3ebe