If you want to contact a certain person use the private message option. And are you sure it isn't in ISO format? Lots of the time it won't have the file extension because Windows hides known extensions usually by default.
hi this is probably a stupid question but when compressing a ISO into a CSO does compression level 9 mean that the file will be smaller or bigger
One thing to do with the compression - Compression level 9 gives the best compression, but takes the longest. If you want to compress it but you don't need to compress it by much and have little time you can choose a lower level of compression.