I am very rusty with DOS and I am attempting to upgrade my software version of DS.  I have an older laptop that is loaded with nothing but DOS.  I originally copied the DS software to the harddrive of my laptop like it recommends in the DS booklet.  I now have the later version of DS on a floppy but how do I install that in place of the original version  that I loaded on the computer.  I tried going thru the same commands that I did to load the software originally but apparently that wont work.  Thanks for the help.