Error Opening DOS based applications

Error recieved:
========================================================
The system file is not suitable for running MS DOS and Microsoft Windows applications.
========================================================

This applies to Windows XP & Win2K

To resolve this issue complete the following steps:

Click Start, and then click Run.
In the Open box, type cmd, and then click OK.
At the command prompt, type the following commands, pressing ENTER after each command: expand CD-ROM Drive Letter:\i386\config.nt_ c:\windows\system32\config.nt expand CD-ROM Drive Letter:\i386\autoexec.nt_ c:\windows\system32\autoexec.nt expand CD-ROM Drive Letter:\i386\command.co_ c:\windows\system32\command.com exit
Start or install the program. If the issue is resolved, do not complete the remaining steps. If the issue is not resolved, go to the next step.
Note: The Command.com file is not edited or created in this in the following process. Because of this, you may have to expand it from your Windows XP CD-ROM. Start Notepad.
In Notepad, type the following entries:
dos=high, umb
device=%SYSTEMROOT%\system32\himem.sys files=40
· On the File menu, click Save As.
· In the File Name box, type Config.nt, and then click Save.
· Close the Config.nt file.
· On the File menu, click New.
· In the new blank document, type the following entries: @echo off
lh %SYSTEMROOT%\system32\mscdexnt.exe
lh %SYSTEMROOT%\system32\redir
lh %SYSTEMROOT%\system32\dosx SET BLASTER=A220 I5 D1 P330 T3

On the File menu, click Save As.
In the File Name box, type Autoexec.nt, and then click Save.
Close the Autoexec.nt file.
Start Windows Explorer. Locate the Config.nt file, right-click the Config.nt file, and then click Copy.
Right-click the %SYSTEMROOT%\System32 folder, and then click Paste.
Locate the Autoexec.nt file, right-click the Autoexec.nt file, and then click Copy.
Right-click the %SYSTEMROOT%\System32 folder, and then click Paste.