Alright, so I want to back u p my entire DVD collection to an external HD. I downloaded DVD Decrypter and ripped the dvd to my pc but there are several problems. 1) It ripped it into separate 5 or so files -(How can I merge all of them and make it just one file?) 2) It's in .vob format and I would like to convert to .avi or .mpg or .wmv. How can I go about doing that? 3) What are the .ifo files and why should I rip them? 4) What program can I use to compress the final file because all the little files total up to about 4gb and I don't really need that good of a quality if it will take up that much space. How about about 1GB?