The description of how to use this script is here. And sorry about the long lines…

echo off

REM -----------------------------------------------------------------------
REM --Make sure the file, password, folder, and drive letter aren't empty--
if "%~f1"=="" goto USAGE
if "%~f2"=="" goto USAGE
if "%~f3"=="" goto USAGE
if "%~f4"=="" goto USAGE

REM --The 5th arg should be /T /A /R or /X--
if not "%~5"=="/T" if not "%~5"=="/A" if not "%~5"=="/R" if not "%~5"=="/X" if not "%~5"=="" goto USAGE
if "%~5"=="/T" if "%~f6"=="" goto USAGE

REM --The 7th arg should be /A /R or /X--
if not "%~7"=="/A" if not "%~7"=="/R" if not "%~7"=="/X" if not "%~7"=="" goto USAGE
if "%~7"=="/A" if "%~8"=="" goto USAGE

REM --The 9th arg should be /R or /X--
if not "%~9"=="/R" if not "%~9"=="/X" if not "%~9"=="" goto USAGE

REM --Make sure the drive letter specified doesn't already exist--
if EXIST %4: echo Drive %4: already exists!
if EXIST %4: goto END

REM --Make sure the archive folder exists--
if "%~7"=="/A" if NOT EXIST "%~8" echo Archive folder does not exist
if "%~7"=="/A" if NOT EXIST "%~8" goto END

REM --Make sure the template file isn't the same file--
if not "%~5"=="/T" if "%~f6"=="%~f1" echo TrueCrypt template and TrueCrypt volume are the same file!
if not "%~5"=="/T" if "%~f6"=="%~f1" goto END

REM --Make sure the template file exists--
if "%~5"=="/T" if NOT EXIST "%~f6" echo TrueCrypt template volume file does not exist!
if "%~5"=="/T" if NOT EXIST "%~f6" goto END

REM --WHERE TO BEGIN?---
if "%~5"=="/T" goto TEMPLATE
goto MOUNT

REM -----------------------------------------------------------------------
:TEMPLATE
echo Copying TrueCrypt Volume template...
copy "%~f6" "%~f1"
if NOT EXIST "%~f1" echo Failed to copy TrueCrypt template volume file!
if NOT EXIST "%~f1" echo (Is the new TrueCrypt volume's path valid?)
if NOT EXIST "%~f1" echo (Are you running Vista and have UAC on?)
if NOT EXIST "%~f1" echo (Is the folder of the new TrueCrypt volume read-only?)
if NOT EXIST "%~f1" goto END
echo TrueCrypt Volume created!

REM -----------------------------------------------------------------------
:MOUNT
echo Mounting TrueCrypt Volume...
"C:Program Files (x86)TrueCryptTrueCrypt.exe" /v "%~f1" /l%4 /p %2 /s /q
if NOT EXIST %4: echo Failed to mount TrueCrypt volume!
if NOT EXIST %4: goto END
echo TrueCrypt Volume mounted!

if "%5"=="/R" goto ROBOCOPY
if "%5"=="/X" goto XCOPY
if "%7"=="/R" goto ROBOCOPY
if "%7"=="/X" goto XCOPY
if "%9"=="/R" goto ROBOCOPY
if "%9"=="/X" goto XCOPY

REM -----------------------------------------------------------------------
:ROBOCOPY
robocopy "%~f3" %4: /E
echo Files copied into TrueCrypt Volume!
goto DISMOUNT

REM -----------------------------------------------------------------------
:XCOPY
xcopy "%~f3" %4: /E
echo Files copied into TrueCrypt Volume!
goto DISMOUNT

REM -----------------------------------------------------------------------
:DISMOUNT
echo Dismounting TrueCrypt Volume...
"C:Program Files (x86)TrueCryptTrueCrypt.exe" /q /d%4 /s
if EXIST %4: echo Failed to dismount TrueCrypt volume!
if EXIST %4: goto END
echo TrueCrypt Volume dismounted!
if "%~5"=="/A" goto ARCHIVE
if "%~7"=="/A" goto ARCHIVE
goto END

REM -----------------------------------------------------------------------
:ARCHIVE
if "%~5"=="/A" move "%~f1" "%~f6"
if "%~7"=="/A" move "%~f1" "%~f8"
echo TrueCrypt Volume archived!
goto END

REM -----------------------------------------------------------------------
:USAGE
echo Creates a TrueCrypt volume of the specified folder
echo.
echo TCBACKUP trueCryptVolume password folderToBackup driveLetter [/T templateVolume] [/A archiveFolder] [/R ^| /X]
echo.
echo   trueCryptVolume    The name of the TrueCrypt volume file to backup to
echo   password        The password of the TrueCrypt volume file
echo   folderToBackup    The folder to store in the TrueCrypt volume file
echo   driveLetter        The drive letter to mount the TrueCrypt volume at
echo   /T            Uses a template TrueCrypt volume file to create the TrueCrypt volume file
echo   templateVolume    The path to the template TrueCrypt volume file
echo   /A            Moves the finished TrueCrypt volume to an archive folder
echo   archiveFolder        The archive folder to move the TrueCrypt volume file to
echo   /R            Uses robocopy to do the copying (default)
echo   /X            Uses xcopy to do the copying
echo.

REM -----------------------------------------------------------------------
:END
echo on