Progress Bar as Listview subitem?

Hi, I'd like to display progress bars in a listview column, as we can see in some p2p software (transfert window in Kazaa for example). My first idea was to create a user control and overlay a progress bar in the rectangle of the subitem. It works but it's slow and I have some problems to refresh... Is there a better way ? Ideally, it would be usefull to insert any control as treeview / listview item. Have you got an idea? Thanks a lot