Download the exe. It provides a nice interface to drill down and show all the event receivers on a given list.
A few notes on event receivers:
In MOSS 2007, the Item Adding event has a null SPListItem, so use the properties.AfterProperties to get or set the fields before the item is added. Also, the ItemID is null as the item has not been created yet.
If using Item Added, you can access the list item through properties.ListItem.
Use a Feature Receiver to deploy the event receiver. This can be a class in the same project that installs on feature activate, and uninstalls on feature deactivate.
Thanks for your recommendation. I will give it a try.