Just to contribute: I use PT4 with Winning Poker Network and DriveHUD with BetOnline. I find that DriveHUD is a lot smoother, faster, and "cleaner" on the screen than using the card catcher with PT4. Both (DriveHUD and the CardCatcher) are made by AcePokerSolutions.

DriveHUD is new so they're still working on and it expanding it but it's a very, very good piece of software for BetOnline. When given the choice of using one or the other (like on WPN) of course I go with PT4 but on BetOnline, that's not an option without the card catcher.

Trust me: Give DriveHUD a look. I think it has a bright future.