Hi Wisewoman,
Here is a website about installation for OS 9 for Macs
http://kb.iu.edu/data/ackt.html

Here is another section that talks about airports http://kb.iu.edu/index.cgi?search=ai...rch&maxdocs=15

Hope that helps.

Here is an interesting site as well
http://w3.trib.com/~dwood/mac.html

As far as cheaper mac parts. You might try http://www.macmall.com/

Good luck. Macs rule in my book.