If you plan to put W2K onto the new harddrive, you can change the bios/setup information to boot to the cdrom as the first device in order to get W2K to boot from the cd, the it will create the partition(s) you want and format it prior to installing W2K on it. This will all be self-explanatory from the screens as they come up.
Disconnect the other two harddrives temporarily so that you only have the new harddrive and the cdrom connected to get this done.
Once you have W2K installed, shut down, and hook up one of the disconnected harddrives as a slave to it. Now change the bios information to again boot from the A: drive as the default.... and boot to the windows desktop.
Go into Explorer on the slaved old drive and then drag and drop folders or files to the new C: drive that you want to keep (or to another partition you may have created on the new drive....if you made partitions, the old harddrive will probably be drive D since it will have a Primary Dos Partition on it from before, but click the drive letters to make sure you know which drives you are 'playing with').
Once you are finished, you can format the old harddrive to empty it out and decide if you want to keep it as a slave for storage reasons, but you still have the second old harddrive to deal with first.
Once you are finished saving what you want from that old harddrive, shut down, and now disconnect that old drive and replace the connection with the second old harddrive, boot up and repeat the same steps you used before to get data you want to save from it.
Once that is completed, you can again format the old drive to empty it out and decide if you want to keep it as a slave or just put it away on a shelf. If you decide to keep one of the drives as a slave for storage, use the largest one of the two.
Remember, that all programs you had installed on either of the two old drives must now be reinstalled on the new harddrive or they won't work. If any of those programs have database information that you want to keep, you can find, on the old drives where the program was originally installed, the files that hold that database information and drag that file to the new location for the newly installed program on C: and when you drop it to that folder, let it overwrite the empty database with the one you dragged.
You now should be able to shut down, reconnect whichever old harddrive you may have decided to keep for storage as the slave, shut the case up, and reboot to the desktop. You will have your new harddrive, a slave drive for storage if you decided to keep one, and your cdrom working fine in Windows.
My 1.4 ghz system has one 20 gig hd and one 10 gig hd on IDE with an IDE cd/dvd drive. I want to replace both hd with an 80 gig hd but save some of the data--not all. Also, do I have to format the drive before install? Help. My OS on the 20 gig hd is win2K. If I take the hds off, how do I get the win2k on--wouldn't the CD/DVD drive be inooerable? HELP