Well, you should just bypass the nic install or letting it detect it and install it after everything else is working. Then you should be able to get the drivers off the Linksys floppy disks provided. http://www.linksys.com
has instructions in compiling it as well.
About the Floppy and CDROM, are there any specific errors it gives? How are you trying to mount to them when you insert any type of media?
Any other problems along the way, let us know.