I am in the process of researching what benefits and costs associated with upgrading my network from windows 2000 to windows 2003. Ive got one location with one server with about 10 clients running on a wireless network. I have another location with one server and about 5 clients.These two locations are connected using a VPN. What costs would be associtated with this and how would the migration go? Is it a smooth process or is there a whole lot that would go into it? Also typically how much down time would i be looking at if I were to go ahead with this. Any input would be greatly appreciated.