If you don't have a copy of the instructions, here's a link: http://service.us.panasonic.com/OPERMANPDF/KXLD742.PDF

This page may get you in the right direction.

http://chrislawson.net/writing/macdaniel/2k1130cl.shtml

I usually grab CD Sunrise at least initially to get the OS to read HFS formatted discs. It's a miniscule download even back in dial-up days and fits easily on a floppy. You'll need something else to read ISO 9660, but most software CDs for Mac of this era are HFS anyway. OS 8.1's included CD driver supports non-Apple CD drives, so you should be set once it's installed.