Thanks Ollie. Still, the CPU load should be the same with FILE mode and ISO mode when burning with CloneDVD, correct? I'm using the same write speed, burner, movie, etc....
Your CPU load will not hit 40% in FILE mode if you have a better PC. Remember that my system is only a 600 MHz PIII. However, your PC should show that CloneDVD uses more CPU load during 4X burn when comparing to Nero. 40% vs. 2% is a huge jump. If I use CloneDVD to burn an ISO file, then the CPU load drops to about 9%. Much better now, but still higher than Nero. Doesn't this sound like something is not shutting down in CloneDVD when burning in FILE mode?
I will run more tests today, but with a clean WXP Pro SP1 image file comparing CloneDVD and Nero in FILE and ISO mode. I suspect the result will be similar. The CPU load may be higher because WXP needs more CPU clock time to do the same amount of work.