Thank you DavidW for your response...
I checked the DMA setting and the Transfer Mode is set to "DMA if available" on both the primary and the secondary IDE channels. However, "Current Transfer Mode" shows "PIO Mode" on both. I've trid to uninstall the IDE channel NEC-2500A is on (primary) but when the PC in rebooted, window reinstalls to return to how it was before.
Next thing I want to try is enabling the "EDI mode" in the Bios as someone had suggested before. How can I do this?
FYI, My pc is a P4 2.4Ghz Dell Dimension 4550 with 533mhz fsb and a pair of 512mb PC3200 rams (tot. 1 gig running at 333Mhz). It has XP Home and I am using the latest Nero Ultra and DVD Shrink. Much thanks!!!