im wanting to start backing up my dvds and i will probably get clonedvd2 and anydvd, and im wondering if i will need dual layer blanks? i wont be using menus or anything just the main movie and audio, and none of them are blue ray. will i need to buy dual layer anyways or can i get single layer? most of my movies are around 2 hours give or take 10 minutes, but the longest movie i have is troy. any help is appreciated