Answer:

1. Activate your original copy of the Foxhound database as an Extended Edition copy,
2. shut down your original copy of the Foxhound database,
3. make 9 file copies of your original foxhound1.db file in nine different folders,
4. start your original copy of the Foxhound database, and
5. use dbsrv11.exe to start the nine copies using different runtime server names: foxhound1b through foxhound1j

By default, Foxhound is installed in this location on Windows XP:

C:\Documents and Settings\All Users\Application Data\RisingRoad\Foxhound1

C:\ProgramData\RisingRoad\Foxhound1

Here is a sample Windows command file that makes the 9 copies in nine different folders and then starts all 10 copies of Foxhound:

REM ******************************************************************
ECHO Making nine Foxhound database copies...

CD /D "%FOXHOUND1%"

MD b
MD c
MD d
MD e
MD f
MD g
MD h
MD i
MD j

COPY /V /Y foxhound1.db b
COPY /V /Y rroad1.dll   b

COPY /V /Y foxhound1.db c
COPY /V /Y rroad1.dll   c 

COPY /V /Y foxhound1.db d
COPY /V /Y rroad1.dll   d

COPY /V /Y foxhound1.db e
COPY /V /Y rroad1.dll   e

COPY /V /Y foxhound1.db f
COPY /V /Y rroad1.dll   f

COPY /V /Y foxhound1.db g
COPY /V /Y rroad1.dll   g

COPY /V /Y foxhound1.db h
COPY /V /Y rroad1.dll   h

COPY /V /Y foxhound1.db i
COPY /V /Y rroad1.dll   i

COPY /V /Y foxhound1.db j
COPY /V /Y rroad1.dll   j

PAUSE

REM ******************************************************************
ECHO Starting ten Foxhound engines...

REM Maintenance Note: When making changes to the dbsrv11.exe command 
REM    line, check all the command files which execute dbsrv11.exe:
REM       $backup_foxhound1.bat
REM       $start_foxhound1_engine.bat
REM       $start_foxhound1_firefox.bat
REM       $start_foxhound1_firefox_debug.bat
REM       $start_foxhound1_ie.bat
REM       $start_foxhound1_ie_debug.bat

IF EXIST "%FOXHOUND1%\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1 -o foxhound1_debug.txt -oe foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49201) -xd -xs http(port=49301;maxsize=0;to=600;kto=600) foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\b\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\b\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1b -o b\foxhound1_debug.txt -oe b\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49202) -xd -xs http(port=49302;maxsize=0;to=600;kto=600) b\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\c\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\c\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1c -o c\foxhound1_debug.txt -oe c\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49203) -xd -xs http(port=49303;maxsize=0;to=600;kto=600) c\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\d\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\d\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1d -o d\foxhound1_debug.txt -oe d\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49204) -xd -xs http(port=49304;maxsize=0;to=600;kto=600) d\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\e\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\e\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1e -o e\foxhound1_debug.txt -oe e\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49205) -xd -xs http(port=49305;maxsize=0;to=600;kto=600) e\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\f\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\f\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1f -o f\foxhound1_debug.txt -oe f\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49206) -xd -xs http(port=49306;maxsize=0;to=600;kto=600) f\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\g\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\g\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1g -o g\foxhound1_debug.txt -oe g\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49207) -xd -xs http(port=49307;maxsize=0;to=600;kto=600) g\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\h\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\h\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1h -o h\foxhound1_debug.txt -oe h\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49208) -xd -xs http(port=49308;maxsize=0;to=600;kto=600) h\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\i\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\i\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1i -o i\foxhound1_debug.txt -oe i\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49209) -xd -xs http(port=49309;maxsize=0;to=600;kto=600) i\foxhound1.db -n f

IF ERRORLEVEL 1 GOTO dbsrv11_failure

IF EXIST "%FOXHOUND1%\j\foxhound1_debug_startup.txt" DEL /F /Q "%FOXHOUND1%\j\foxhound1_debug_startup.txt"

"%SQLANY11%\Bin32\dbspawn.exe" -f "%SQLANY11%\Bin32\dbsrv11.exe" -c 5p -ch 10p -cr- -gk all -gn 120^
  -n foxhound1j -o j\foxhound1_debug.txt -oe j\foxhound1_debug_startup.txt^
  -on 10M -qn -sb 0 -x tcpip(port=49210) -xd -xs http(port=49310;maxsize=0;to=600;kto=600) j\foxhound1.db -n f

IF ERRORLEVEL 1 ( GOTO dbsrv11_failure ) ELSE ( GOTO dbsrv11_success )

:dbsrv11_failure
ECHO ******************************************************************
ECHO *** ERROR ********************************************************
ECHO *** dbspawn/dbsrv11 set ERRORLEVEL = %ERRORLEVEL%
ECHO *** To display startup diagnostics,
PAUSE
IF NOT EXIST "%FOXHOUND1%\foxhound1_debug_startup.txt" ( GOTO file_does_not_exist ) ELSE ( GOTO file_exists ) 

:file_does_not_exist
REM ******************************************************************
ECHO *** No startup diagnostics are available.
PAUSE
GOTO end

:file_exists
REM ******************************************************************
TYPE "%FOXHOUND1%\foxhound1_debug_startup.txt"
PAUSE
GOTO end

:dbsrv11_success
REM ******************************************************************
IF NOT EXIST "%FOXHOUND1%\foxhound1_debug_startup.txt" ( GOTO end ) ELSE ( GOTO display_file ) 

:display_file
ECHO ******************************************************************
ECHO *** ERROR ********************************************************
ECHO *** To display startup diagnostics,
PAUSE
TYPE "%FOXHOUND1%\foxhound1_debug_startup.txt"
GOTO end

:end
REM ******************************************************************
ECHO All done...
PAUSE
EXIT

See also...
How do I start Foxhound?
How do I tell Foxhound to use an HTTP port other than 80?