1. In v9 you can use a solid as a stock for verify. You need to draw your solid casting, save as an STL, and then in the verify dialog select "use file" for verify stock definition.
In X, there is an option right off the bat in the verify dialog to use a solid as a stock. That solid has to be in your current file, and visible on the screen. If it meets those criteria, you can bypass the the stl stage. If you want to use a solid in a different file for stock def, then you need to save as an stl and go the previously mentioned route.
2. For 4th axis, you do not use wcs to change A. output. It will not output a A move in your post (generally speaking). You set your wcs, and then leave it. You change you Tool and Construction plane (T/C), and THAT will output A. moves.