[El Sanchez]

Damien_here,

Код:

@Echo Off
SetLocal
Set Source=C:\temp

For %%A In ("%Source%\*.DAT") Do Call :_Proc "%%A"
GoTo :EoF

:_Proc
	Set FN=%~n1
	If Not "%FN:~9,1%"=="" Ren %1 "%FN:~0,5%tmplt%FN:~10%%~x1"