You need two files for img. One is image itself (that is .img), and second is topology file. Most often it's .ccd, but .cue will work too. (Inside last one you can see also what is on disc, as cue gives it in plain text).
In our case it is:
FILE "AZ_2246.img" BINARY
TRACK 1 MODE1/2352
INDEX 1 00:00:00
TRACK 2 AUDIO
INDEX 0 00:11:00
INDEX 1 00:13:00
TRACK 3 AUDIO
INDEX 1 00:55:02
TRACK 4 AUDIO
INDEX 1 01:38:04
TRACK 5 AUDIO
INDEX 1 03:00:06
TRACK 6 AUDIO
INDEX 1 04:33:12
TRACK 7 AUDIO
INDEX 1 06:22:14
TRACK 8 AUDIO
INDEX 1 07:27:16
TRACK 9 AUDIO
INDEX 1 08:17:18
TRACK 10 AUDIO
INDEX 1 09:30:20
TRACK 11 AUDIO
INDEX 1 11:26:22
TRACK 12 AUDIO
INDEX 1 13:04:24
TRACK 13 AUDIO
INDEX 1 15:04:26
TRACK 14 AUDIO
INDEX 1 16:15:28
TRACK 15 AUDIO
INDEX 1 17:27:30
TRACK 16 AUDIO
INDEX 1 19:35:64
TRACK 17 AUDIO
INDEX 1 20:50:66
TRACK 18 AUDIO
INDEX 1 22:05:68
TRACK 19 AUDIO
INDEX 1 24:02:70
TRACK 20 AUDIO
INDEX 1 25:45:72
TRACK 21 AUDIO
INDEX 1 27:23:74
TRACK 22 AUDIO
INDEX 1 28:49:01
TRACK 23 AUDIO
INDEX 1 30:34:03
TRACK 24 AUDIO
INDEX 1 31:58:05
So one data track, and 23 audio ones.
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