Copy files to a DVR-W

Hi, I am trying to copy .mov & .avi files onto a DVD-RW, to be able to use as a copy if anything goes wrong with the PC.
I have tried to use a couple of backup programs but they arent recognized by the PC. Could someone please help me out by explaining the steps I need to do, as its doing my head in.I am using WinXP home .

Thanks Mac

KTrout, welcome to the forum!

Which backup programs have you tried so far? Which DVD-RW drive do you own? Most retail drives come with a CD/DVD that has a bundled Backup Software (Nero is the most common of them). Have you tried that yet?