>>Something like this

oFSO = CREATEOBJECT("Scripting.FileSystemObject")
>>* lcfolder is the fully qualified
>>* directory name
>>oFolder = oFSO.GetFolder(lcfolder)
>>FOR EACH oFile IN oFolder.Files
>>  oFile.Name = FORCEEXT(JUSTSTEM(oFile.Name) + TTOC(oFile.DateLastModified), JUSTEXT(oFile.Name))
>>NEXT

if I understand correctly.
>
>Would that approach would from a VB script file that we would be able to execute from DOS? The reason I am asking this is because I want to avoid to install the VFP run time.

I understand that, but you don't have to run it from DOS. You could simply run it from the Run menu item in Windows.