When the install prompts for CDROM #2 it responds with "That's not the correct Fedora Core CDROM".
I have verified the checksum on the Disc2 ISO file and even tried burning a second copy but it still produces the
same error.
A google search reveals that at least one other person has had the same problem with Disc2, but no solution.
Just ignore it. Click it away. The second time installation goes on. In my case this worked. Not only with disk2 but also with #3 and #3.
Jaap