i am looking for a program that i can use to burn dvds but compress them so that they dont take up so much space on the disc.when i try to burn a file that is only 700mb onto a 4.7gb disc it takes up 3+gbs. why does this happen?????when i burn cds i use sonic and i can use a certain feature to compress files so that i can fit 100+ songs on 1 disc.the downside is that it only plays on certain players. is there anything out there like this for dvds??????