This worked great for me, but here on Win2k SP4 I had to modify the script a little:

rem -- UnRegister MS Tablet PC Ink Pen components
set sys32=%SystemRoot%\System32
set pfcfink=%CommonProgramFiles%\Microsoft Shared\Ink
"%sys32%\WispTis.exe" /unregserver
"%sys32%\regsvr32.exe" /u "%sys32%\inked.dll"
"%sys32%\regsvr32.exe" /u "%pfcfink%\InkObj.dll"
"%sys32%\regsvr32.exe" /u "%pfcfink%\gdiplus.dll"
"%sys32%\regsvr32.exe" /u "%pfcfink%\tpcps.dll"
rem "%sys32%\regsvr32.exe" /u "%pfcfink%\inkdiv.dll"
set pfcfink=
set sys32=
pause