You can rename a folder using the Name statement.
Dim sOldPath As String, sNewName As String
sOldPath = ActiveWorkbook.Path
sNewName = ActiveWorkbook.Worksheets(1).Range("A1") 'Desired name for the folder
ActiveWorkbook.Close SaveChanges:=False 'You must close the workbook before renaming its parent folder
Name sOldPath As "C:\My Documents\" & sNewName
Renames folder ABC to the contents of cell A1 in the first worksheet in the active workbook.
Brad