Dual Layer is part of the basic DVD standard - a DVD drive must read dual layer discs. (And I can verify the Creative drives do read dual layers just fine). In fact, there are two dual-layer standards - it depends how the "break" is handled. A single layer disc works from inside out, but the second layer could go outside in or inside out, the former preferred as the head doesn't have to seek to reacquire the track.
However, manufacturing dual layer discs was very new then - and playback on DVD players of dual layer discs was annoying. Sometimes nowadays you still see "Dual layer - the movie may pause for a seconds while switching layers" which is true of most DVD players of the era - the movie would stop for 3-5 seconds while the drive switched layers (true of both kinds of dual layer discs). Modern drives used in players are so fast, and memory cheap enough that there's a buffer large enough to handle the layer switch so it's completely seamless. But back then, you could expect the pause - and for those 3-5 seconds, you'd wonder if the disc you had was broken.