I just installed NAV 2007 and I have to say it's running very quietly and not using much in the way of resources.  Right now I have P6, Vue5 and IE7 all open and I'm not seeing any problems at all, even when I switch between the apps.  I know NAV 2004 was a HUGE resource hog but 2006 was better and 2007 is really good. My total CPU usage right now for all running processes is 2%.

Hugz from Phoenix, USA

Victoria

Remember, sometimes the dragon wins. Correction: MOST times.