Might consider an external (SCSI) CD-ROM drive or get an internal one installed. OR maybe put your HD in another machine and install the OS there… and then move it back to your PB.
I’ve no expereince with the CF card OS-install “adventures” but perhaps
someone else(?) here may be able to help with that. (I’m not so sure that it would work.) Might be able to “connect” it via SCSI disk mode, with another SCSI Mac… and approach it in that way?
There’s my two cents, “shot from the hip”.
Without a CD-ROM drive… you’re going to have
some fun. Best of luck.