The best way to get started with PyQt4 is to look at some working examples that are similar to the application you want to write. The PyQt4 source has lots of these - download it from here, and have a look in the examples directory.
In addition to this, there are numerous tutorials available that will help get you started. A good place to start looking is the PyQt4 wiki.
Once you've worked through a few tutorials, you will probably be able to achieve what you want quite easily. And if you get stuck on something, you can always come back and ask about it on SO (just make sure to ask a specific question, and post the code that you have so far).