If you are looking for a quick way to manage event handlers in SharePoint 2007, please check out my solution at CodePlex and download a WSP package that will allow you to do this using STSADM.
There are many ways to register event handlers and you can certainly pick your flavor. However, please feel free to use this solution I wrote a few years ago (but only recently published to CodePlex).
You can do the following with this solution:
- Add event handlers
- List registered event handlers
- Delete event handlers
All this from the command line ease of STSADM.
Also, please stay tuned as I re-work this solution as PowerShell extensions for SharePoint 2010 in the near future.