DiscJuggler Image files extraction

I"ve made many images (audio compilations) with DJ 3.50.830.
Now i want to modify some of them eg delete 2-3 songs and add some new ones.
How can i do that? i"ve tried with no luck:
a) CDmage 1.01.5 freezed when i open a .cdi file.
b) IsoBuster, have no option to extrcat to .wav files.
c) DiscJuggler, start a new premastering task, add the image file(as Poko suggests...) delete the songs i don"t want anymore and add the new one,...and the final burnt CDR has the 1st song only plus the new added one! :confused:
What am i doing wrong?
 
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