Ok, so you have enabled the following boot from settings??
1st = CD/DVD ROM
2nd = Floppy Disk
3rd = Hard-Drive
I use these settings in my bois, and I have the option of booting from either floppy or cd/dvd....
There SHOULD be a message saying something like
"Press any key to boot from CD...."
If you don't get this, then your bois isn't configured correctly.... You could try "restoring the bois to factory settings" by either taking the CMOS battery out and leaving it out for around 10 minutes or use the Jumper to restore which will take 30 seconds instead (most nre motherboards have this jumper)