i just want to make a image file from a disc with imgburn.it asks me to choose the file type to keep the image file.there are 5 choices there:"iso files","img files","bin files","wav files",and "all files".i am not sure which one to choose.then i have read some posts in this forum,it is written ,"ImgBurn defaults to picking the right file type for the disc you've inserted when it automatically generates the destination file name".furthermore,it is also written,"if i want to choose the file types manually by myself,i should choose bin for cds and iso for all the others".from here,we can conclude that only these 2 choices("iso files" and "bin files") are useful,and all the other 3 choices("img files","wav files",and "all files") are absolutely of no use at all.so i 'd like to know what's the real use of these 3 choices("img files","wav files",and "all files"),and if these 3 choices are really of no use at all,why they are listed there for us to choose?