A few general comments1 Downloading Microsoft MS-DOS IS ILLEGAL.
"Freedos" or some other thing may not be
2 Using an external drive may be tough, but messing with DOS may be a waste of time. You probably can do this just as well on a '98 machine, and they already have DOS functionality. Additionally, I don't understand what you are going to install DOS "on." If you try to install it on your '98 machine, you'll have a "mess" goin'
3 You cannot use diskcopy to copy disks of differant size, capacity, and format.
4 If these are disks that encomass installation disks for some software, they may have what is called a "volume" label, which, if you were to look at them in Whenhozed, would show that in "properties". When you put a name on a disk in Whinehoed, you are essientally changing the volume label. The point is, that many install programs must have a certain label to work. DOS622 is, for example, that way. That is to say, if you just try and copy the contents of these disks, you may "miss" the directory structure, if any, and the disk label.
I'm not familiar with whatever drive you are trying to hook up, but here's the deal:
First, are you sure of the floppies? That is, are they 180kb, 360kb, 1.2 mb floppies?
What about your drive? What capacity is it for sure, and more important, does it match the floppies. Far as I know, a 5 1/4 drive will only normally read what it was designed for, and, depending, downwards.
The tracks on a 360k floppy are wider than a 1.2 mb, so.....
If your drive is 1.2 mb, and the floppies are either 360k or 1.2 mb, they should work.
However, if the floppies are 360k, and have been written on a 1.2mb drive, AND IF your drive is 360k, it probably won't work.
If your floppies are 1.2mb, and the drive is 360k, it won't work.
If it were me, I'd do a couple of things. (For the record, this very here 2.8ghz, WhendozXP machine, has a 1.2 mb floppy drive!!!)
I'd go down to the thrift store, wherever, friends, etc, and obtain a proper size floppy drive. Also make sure you have the correct cable. Before you do that, check in your motherboard bios, and make sure that it will support a 5 1/4 floppy drive.
Even if you don't mount it in the case, you can "hang" it long enough to copy the data off those floppies. You don't need to copy to othe floppies, just copy them to the hard drive, and again, pay attention to the vol. labels.
If that doesn't work, and or if you have trouble with this external drive, just go find a (thrift store) 386/486 with at least a 5 1/4 floppy, and copy them off THAT. If nothing else, you can later slave the hard drive into your desktop, and copy them from there.
Frankly, if I had to mess with building a cable just to do this, they'd be in the trash.