Good Links BB,

There is a lot to consider when migrating from win2k -> win2k3, and even more with NT4 It is definitely not the case of turn old server off and plug in new server... a lot of configuration etc... Not even sure NT4 supported Active Directory??

Also, I think the reason the network resource seem to disconnect is the Kerberos Authentication from win2k... I think it has to retry every time a client needs to access network shares... not sure though, perhaps Dehc can give some good insight.