i have no problem with PHM regeditor on 6.5.
but i recommend giving DotFred's task manager a try:
http://www.dotfred.net/TaskMgr.htm
very small app with tons of features..
- Process manager
- CPU usage (with CPU graph)
- Application Manager
- Service Manager
- Device Manager
- Windows Manager
- Notification Manager
- IP Config utility
- Ping utility
- Net Stats utility
- Registry Editor
- Run program utility