Slow network browse speed

I have tried almost every tweak for curing Windows xp slow network broswse performance out on the net. We are in process placing Dell Inspiron, Optiplex desktops running xp pro on a NT4 network.

When I browsed on a nt4 file server thru a mapped drive, it takes 23 seconds to see files and folders on the server. The time results are pretty consistent with each fix/tweak.

Do anyone has a magic fix for this annoying xp problem?