It is possible that it is a kind of hard disk emulation.
There are THREE ways to make bootable .ISO
1) El-Torito or "floppy emulation" mode, where you use a floppy image emulation of either a 1.44 or 2.88 Mb floppy
2) The no-emulation mode, where you use a "special" bootrecord, like Win2K/XP original install
3) The "Hard disk" emulation mode, where you use a hard disk emulation mode
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the iso is the Acronis Disk Director Suite boot disk.
I have not have that product, but all reference indicates that everything is in the boot file, see this:
http://www.bootcd.us...in_Details/326/
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Acronis True Image and Acronis Disk Director Suite
Put the Acronis True Image-cd into the cd-drive.
Use and start ultraiso
http://www.ezbsystems.com/ultraiso/. Tools > Make CD/DVD Image > Output file name: ti.iso> Make > OK Return > Click local filename - list and press F5.
Doubleclick to open ti.iso > Bootable > Save Boot File > Enter name: ti.bif > Save
Move ti.bif into the plugin\ezboot folder.
Put the Acronis Disk Director Suite-cd into the cd-drive and make the same steps but use dds.bif.
It is possible that Acronis uses some undocumented format, the feature to open it has been added to UltraISO just a few weeks ago:
http://www.ezbsystem...iso/history.htm
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UltraISO 8.51 PE (September 29, 2006)
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+) Can open BIF files extracted from Acronis TrueImage 9 bootable CDs
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jaclaz