I have a group of files(.000, .001, .002 etc) that I joined together with HJ join to form one file. The associated imformation that came with the file says that it is a ISO file, although once rejoined, it did not appear as such. I renamed the file to have the .iso file extension. When I go to burn the image with alcohol 120, it says it is still an unsupported image file format and that I must manually set track size, block format and other information. Does any one have any idea where I went wrong?