Data DVDs are simple enough. Chances are you have a program on your PC that came with the DVD writer. Just keep each AVI to under 4.3GB, call it 20 minutes.
However, you would be better off with an external USB2.0 or Firewire drive.
But why do you need to put them on a DVD? For use in another PC? If the same PC, what is the point?
Steven
Adobe Premiere Pro 1.5 / After Effects 6.5 Pro https://www.stevengotz.com
Learning Adobe Premiere Pro 1.5 https://www.lynda.com
Contributing Writer, PeachPit Press, Visual QuickPro Guide, Premiere Pro 1.5