I'm not exactly sure what you're trying to do here, but in my experience of working with floppy system installs is to have all the floppy install disks as disk images. Mount them all on the desktop and perform your installation from there. It's much faster than feeding in floppy disks and gets around any bad floppys that might cause the install to fail.

If you've got a working system on your PB, boot it from that, and separate out the system and finder from the system folder and put them in separate folders so the new system you're going to install doesn't install it over the old system, but creates a brand new fresh system folder.

If any of your PB 180 Install disks are dodgy, I may be able help you out as I think I have a set of PB 180 install disks as disk images, but I'd need to check as it might be for an older PB model.