Sorry, I don't undertand clearly so far.It is not the purpose of the current experiments to boot Parted Magic.
Current beta Parted Magic does mount a ISO image and find pmagic.7z at mounted image.
Does current ideas relate on mounting a ISO image?Parted Magic is simply the mini-distro we are using to test our ideas.
Does current ideas work at a Parted Magic 2.2 too?
If a more general solution is seeked (without mounting ISO image):
Why use a distro for testing with mounting ISO image?
To Post #65:
How does Parted Magic find pmagic.7z?
Does Parted Magic find file inside grub4dos mapped drive?
Does Parted Magic mount ISO image pmagic-svn.iso from physical CD-ROM and find file next?
Yes of course, testings are fine.Yes, it is doubtful, but heck, one can do some tests and explore someting new just for the sake of it.
However often it's nice to define testing conditions and destination first.
This redjuce misunderstandings. And is required to use the same testing environment and interpret results.
No a graft-point redirect input to another output.You should think of this graft-point as something like a directory entry pointing to "nowwhere".
A file 'a' at hard disk may get a file 'b' at CD. A directory can redirected too.
Some examples:
/XP_INST_XPS1/WIN51IP=nul:
/XP_INST_XPS1/WIN51IP.SP3=nul:
/XPS1/=multi/XPS1/I386
/XPS1/=XP_PRO_SLP_SP3/I386
/XP_INST_XPS1/I386/=XP_PRO_SLP_SP3/I386
/XPS1/$OEM$/=multi/XPS0/$OEM$
/XP_INST_XPS1/$OEM$/=multi/XPS0/$OEM$
/pmagic/pmagic-svn.iso=%temp%/pmagic-svn.iso
DOS did define a nul: device, so does windows still.
To create a empty file: redirect input nul: device to a output file