Recovering DC42 images?

Hi all, This is one I've been working on for a bit without success, and I'm hoping the community has some ideas to offer. I'm attempting to recover the Lisa Xenix images on BitSavers so I can boot up a Lisa for an exhibit. I've managed to get the images onto a Mac IIci over the network (rather than through the dance of PC to Mac file formats), but DiskCopy 4.2 doesn't recognize them. I used the boot.dc42 image on LisaEm and got it to boot as far as it will (Ray acknowledges in the documents that Xenix doesn't work on LisaEm yet), but of course the emulation is likely written to the image: still, it suggests the images are likely OK. I found information that suggested it was necessary to use an older Mac to generate the correct disk format: I've formatted my 400K disks on a Mac Plus under System 6.0.3, and run DC on that Mac, too. Still no joy. Any suggestions? Thanks -- Ian