Okay, so you are putting them on a CD because they are too big for a floppy. The centris should understand ISO-9660.
Alternatively you could transfer them using the network (TCP/IP), or AppleTalk (on Windows 2000 server), or on the serial link with Kermit or similar.
How many do you want?
Normally you boot from the floppy and click on the installer. Turn system on and put floppy in while it's doing the memory check, if it ejects the floppy it doesn't like it.
However it you are replacing an existing system then drag the old System Folder on the harddisk to the trash.