copying DATA to DVDs

I have free software (Intervideo WinDVD) that will copy movies to DVD, but I need something that will copy general files to DVD just like Windows XP does for CDs. I've tried using Swiftdisc Burning Wizard, but it never completes the copying successfully. So is there any free software that copies data to DVDs reliably? Thanks.

i use nero6

but nero7 is out now.