Convert your DAT file to MPG first using VCDGear (from w*w.vcdgear.com ). If you want it as a DivX, as suggested, read the MPG to DivX tutorial. If you want to be a VCD, many MPG's downloaded are already in that format. Try making a VCD with Nero, drag the MPG file in. If it accepts it, then burn to VCD and the jobs done. Again, the DVD to VCD tutorial will explain how to do it in detail.