Hi Chris,
Glad you find PC Monitor solution useful.
To answer your questions:
1. We will consider making this an option - at the moment you have to delete them as some notifications will not be sent again if not deleted (and the condition that triggered the notification still persist). In other words, if you read the notification that does not mean that the condition that caused the notification has been rectified and we think leaving the alert image is good.
2. We plan to add remote control in a future release.
3. Windows 2000 is not supported at the moment (we might consider this by writing a plugin).
Best Regards,
Marius