Public Sub Rename()
Dim r As Range
Const csPath As String = "C:Temp" 'Set appropriate path here
For Each r In Range("A1:A100") 'Set range reference as appropriate
If Len(r.Value) > 0 Then
Name csPath & r.Value As _
csPath & Evaluate("=REPLACE(" & r.Address & ",LEN(" & r.Address & ")-4,5,""F.png"")")
End If
Next
End Sub