The left is the coordinates for the selected polys, segments and points. The right is for the object when Object, Model and Axis Tool is choosen. But theres no difference when one use the Texture Axis .
/sidefx
Arrange the objects this way(a slash is one step down in the hierarchy)
Boolean
/Large Cube
/Small Cube 1
// Small Cube 2
// Small Cube 3
// Small Cube 4
The folder Citygen should be placed in the pluginfolder directory, so you have done that right. When you choose the plug inte the plugin menu in c4d the preset scen with a bunch of buildings is shown. Have you tried that? Maybe you have a corrupt scene file? I am using it on OSX G5 Dual without any issues.