An FDISK script from a patron of www.fdisk.com named Ryan:

To make FDISK do whatever you want, automagically
go through a dry run in FDISK and write down all the options you enter
edit a file and call it fdisk.scr
in that file, put each option, one per line, and make sure you press
return after each one
save the file
now, when you run fdisk, make sure you run fdisk < fdisk.scr
and viola.. you are all fdisked up

as an example my batch file looked like this
REM ** autoform.bat**
echo Run FDISK?
choice /c:yn
if ERRORLEVEL 2 then goto FORMAT
if ERRORLEVEL 1 then goto FDISK
:FDISK
call fdisk.bat
goto END
:FORMAT
format c: /s/u
goto END
:END

REM **fdisk.bat**
fdisk < fdisk.scr