Will the software go to a hard disk and run? Some pieces of software have
had stupid tricks applied to insure that the software isn't pirated and they
require that the software be run with the original disks in the floppy
drive. If so, you are right in that the only thing you can do is find a
later version that will run on a hard disk.
The unfortunate thing is that windoz XP doesn't support DOS correctly
anymore so you will have to find DOS 6.22 and install it on a HD.
FWIW, I've got several smaller HDs that will be much more than needed for a
DOS program and will run well in a faster machine.
I'll also note that a floppy disk drive is still a nice thing to have to get
stuff on and off of a computer. On the other hand, even windoz for
workgroups will do an excellent job of working with an ethernet connection.

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Why isn't there an Ozone Hole at the NORTH Pole?