Dvd2onex and virtual memory

This is probably an operating system issue, but maybe not. Top reports that dvd2onex uses 5.3 megs of memory and 115 megs of virtual memory. But when it runs, all the free memory gets used up, you start getting lots of pageouts, and top reports 12.5 MByte free memory. At that point it becomes glacially slow to launch applications and do other stuff. I am running Mac OS 10.2.6 on a 1GHz PowerBook with 1G memory. Is this a Mac OS X issue or is there anything dvd2onex can do about this? DVD Backup has the same behavior.

I’m using a G4 DualProcessor 1.25 ghz with 256 mbs only and everything runs smoothly including running most of my other applications at the same time.