All of the functionality in Graphics`PlotField` has been added to the built-in Mathematica kernel.
Load VectorFieldPlots` to use Graphics`PlotField` functionality:
Version 5.2
<<VectorFieldPlots`;VectorFieldPlot contains the functionality of PlotVectorField:
Version 5.2
VectorFieldPlot[{x, y}, {x, 0, 1}, {y, 0, 1}]ListVectorFieldPlot contains the functionality of ListPlotVectorField:
Version 5.2
ListVectorFieldPlot[Table[{x, y}, {x, 0, 1, .2}, {y, 0, 1, 0.2}]]GradientFieldPlot contains the functionality of PlotGradientField:
Version 5.2
GradientFieldPlot[Sin[x]Cos[y], {x, 0, 2Pi}, {y, 0, 2Pi}]HamiltonianFieldPlot contains the functionality of PlotHamiltonianField:
Version 5.2
HamiltonianFieldPlot[Sin[x]Cos[y], {x, 0, 2Pi}, {y, 0, 2Pi}]PolyaFieldPlot contains the functionality of PlotPolyaField:
Version 5.2
PolyaFieldPlot[Sin[x + I * y], {x, 0, 2Pi}, {y, 0, 2Pi}]