The floppyimages appears to be non bootable, and i'm unable to read them in my 86box vm's. The first floppy images appears to contain the files to make a bootable floppy.
I've created a bootable 1.44M floppyimage of the demoversion that is patched to remove the 1 minute delay. The patcher is included so you can patch your installation on your harddisk https://archive.org/details/ptsdos-patched
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You may want to check out http://www.z80.eu/ptsdos.html .
https://almnet.de/ptsdos/files.html contains some other versions of PTS-DOS 2000, including a German version.
I've created a bootable 1.44M floppyimage of the demoversion that is patched to remove the 1 minute delay. The patcher is included so you can patch your installation on your harddisk
https://archive.org/details/ptsdos-patched