Burn cdi iso with Discjuggler

[Hakon]

Hello ! I have a cdi image "shenmue 2 779 Mb". When i open
the file after download (zipped) in Winrar the file has the
*.cdi letters to it but after unzipping it has a different name
not with cdi at the end
well i tried to burn it anyway in DJ and it all went fine but "all"
that was on the cd (TDK800 mb) was the original cdi image!
I have opened the file with isobuster and it seems to be correct
I have made an Dreamsnes cd to my dc and it worked great
does this mean it works with backup discs too ?