I have read through many posts, so I am hoping to not be asking too many repetitive things...My question for everyone is this: I have a mac, and I am going to buy an external burner, so with the iDVD can I use this software and only this or am I going to need a 3rd party software such as DVD decrypter? Also, what kind of blank DVD's do I buy? Can I buy any general use DVD-R? Thank you for all your help!