Changing Burning from Dual Layer to Single Layer (Optiarc AD-7220)

[qanda]This thread is about the Optiarc AD-7200A. Click here to see full specs[/qanda]I actually have an AD-7220, but it was not listed on the product list. I just installed this in my computer, but when I go to burn either on Nero 8 or Ashampoo, it is burning as a dual layer, instead of single layer, and I dont know how to switch it back to single layer. Anybody know the answer???

Select DVD5 or DVD-ROM template.

Can you walk me thru how to do that? I am good with computers, but not smart enought to totally figure it out on my own…LOL If you can give me step by step instruction that would be great!! I also have Nero 8 as my burner or even Ashampoo in case you need to know that.