IProgressDialog with a custom dialog or information about how the animation is performed

Question

There are basically two questions here, an answer to either is fine.

1) Is there a way to add items into an IProgressDialog? Such as drawing more text (than the few lines provided) or an image or adding a button? Is there a class that overrides this that provides extra functionality? (Since I'm not doing a file operation, the IFileOperation interface doesn't work for me. But is there something similar?).

or

2) How does the animation at the top of IProgressDialog work? Is there a way to perform just that animation without using this interface? I know on pre-vista machines, it was just an AVI file, but how is it done now? (Short of just drawing 100 images with a timer).

Thanks!