how to use defined shapes

I have a littke question:
when I made an object , and defined it as a shape, how can I multiply it ? There's no cut and past possible?
One more, how do I make rolloverswithin a photoshop document?

Thanks a lot !

Just select the Custom Shape Tool, then choose your shape from the drop down menu at the top of the screen.

As for rollovers, you have to do those in imageready, not photoshop.