I tried burning a DVD using Cyberlink power Producer which has about 6 movies in it & everything fits well.. i calculated...the movies are all together 4109MB but in the PowerProducer, it shows 33119MB... how come? & the DVD memory is 4700MB..... and when i try to burn, it says : the size of imported files exceeds the amount of available disc spac. Free disc space: 4706MB....... HELP!!!! i need to burn those movies very soon..