hi, yes, central server is the way to go this is what I was advicing from quite some time. so right now we can go ahead with a simple monolog kind of information to keep things streight and simple. then once we have the technicalities worked out "cost effectively " we can use the same existing infrastructure to build the system in ints advanced stage. what is required is to have the right infrastructure which can be used further for advanced ideas without much re implementation. for example this Idea of central server. Krishnakant.