We create the dummy-track used as the second track of session 2 out of the mentioned PM_DUMMY.DAT-file:
MAKETRK -z -t1 -mTRAK PM_DUMMY.DAT

PADCD +100000 PM_DUMMY.T01 PM_DUMMY.RAW


The MAKETRK-call will do the following:
The output-file PM_DUMMY.T01 should  look like this:
00000000 0000 4154 5249 4154 5249 4154 5249 4154 ..ATRIATRIATRIAT
00000010 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00000020 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00000030 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00000040 5249 4154 4152 4920 4150 5052 4F56 4544 RIATARI APPROVED
00000050 2044 4154 4120 4845 4144 4552 2041 5452 DATA HEADER ATR
00000060 4921 5452 414B 5452 414B 5452 414B 5452 I!TRAKTRAKTRAKTR
00000070 414B 5452 414B 5452 414B 5452 414B 5452 AKTRAKTRAKTRAKTR
00000080 414B 5452 414B 5452 414B 5452 414B 5452 AKTRAKTRAKTRAKTR
00000090 414B 5452 414B 5452 414B 5452 414B 5452 AKTRAKTRAKTRAKTR
000000A0 414B 0101 0101 0101 0101 0101 0101 0101 AK..............
000000B0 0101 0101 0101 0101 0101 0101 0101 0101 ................
000000C0 0101 0101 0101 0101 0101 0101 0101 0101 ................
.....
.....
000400D0 0202 0202 0202 0202 0202 0202 0202 0202 ................
000400E0 0202 4154 4152 4920 4150 5052 4F56 4544 ..ATARI APPROVED
000400F0 2044 4154 4120 5441 494C 4552 2041 5452 DATA TAILER ATR
00040100 4921 4154 5249 4154 5249 4154 5249 4154 I!ATRIATRIATRIAT
00040110 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00040120 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00040130 5249 4154 5249 4154 5249 4154 5249 4154 RIATRIATRIATRIAT
00040140 5249 RI

And because the Jaguar-CD-system prefers tracks with sizes bigger than 1MB we call PADCD to blow up the created track-file "PM_DUMMY.T01" by $100000 bytes (=1MB). The resulting file will be called "PM_DUMMY.RAW".