Did you use the backup utility to back it up, or did you copy the program?
If you used the Windows 98 backup utility, the backup file would not be
compatible with Windows XP. If you COPIED the program to a floppy disk,
insert the floppy disk, double click the My Computer desktop icon, double
click your C: drive, click the File menu, click New/Folder. A folder with
the name New Folder will appear at the bottom of the list of folders on your
C: drive. Right click that folder, left click Rename, and type the name of
the program. Then click an empty area in the window to set that new name
for the folder. Then with the floppy disk in your drive, click the BACK
button on the toolbar, then double click on 3 1/2 Floppy (A

. You will
then see the file or files on the floppy disk. Click the Edit menu, click
Select All, and any files on the floppy disk will be highlighted. Click the
Edit menu again, and click COPY. Then click the BACK button on the toolbar,
then double click your C: drive. You will see the list folders on the C:
drive. Scroll down to the one that you previously created for this program,
double click it. Then click the Edit menu, then click PASTE. The files
from the floppy will be copied to the program folder that you created. If
there is only one file right click it, and left click: Send to Desktop
(create Shortcut). This will put an icon on the desktop to run the program.
If there's more than one file, find the one with the .exe extension and
create the Desktop Shortcut from that. Then close My Computer.
To add: Not all DOS programs are Windows XP compatible. Some might run
fine. Some might need to be run in a Compatibility Mode. If the program
won't run: Try right clicking the desktop icon for it, left clicking
Properties, clicking the Compatibility tab, and select the Windows 98 or
Windows 95 Compatibility Mode. If the program won't run in the
Compatibility Modes: Some DOS programs will only run with 256 colors or
only in 640x480 screen resolution. So, try the compatibility modes first,
and if that doesn't work, on the same tab try the 256 colors and/or the
640x480 screen resolution. If the amount of colors or the screen resolution
has to be changed to run the program, if you set those on the Compatibility
tab, when you double click the icon to run the program, Windows XP will
automatically change the settings to run the program, and when you exit the
program will automatically change those settings back to your Windows XP
defaults. If none of the above works, then the program might not be able to
be run using Windows XP.
Lastly: I haven't mentioned how to copy from the CD which you created with
Windows 98, because unless the software that you used to create it is
installed in a Windows XP compatible version on the Windows XP system,
Windows XP probably wouldn't be able to read the CD.