OK, sometimes the best way to do things is the hard way:
Open up a command prompt (the thing that looks like a DOS box). Type ls /mnt/floppy. If it comes back with absolutely nothing, then type [b]mount /mnt/floppy[/i] and then try ls /mnt/floppy again. Once you have established that you can see the contents of the floppy disk, post here what exactly is on the disk.
Note: rpmdrake is only really any good for installing/uninstalling programs that use the extension .rpm. If the files on the floppy are anything other than .rpm files, then a different approach is needed.