[JRD!]

Just change the position of the WizardForm.StatusLabel on CurStepChanged event,
and hide the StatusLabel in ssPostInstall

Filename: {src}\support\{#Soft2}\vcredist_x86.exe; Parameters: /q; StatusMsg: Aguarde: Instalando {#Soft2}...; Check: Soft2 and CheckError

StatusLabel := TLabel.Create(WizardForm);
With StatusLabel do 
begin
  Parent := WizardForm;  
  Caption := 'Extraindo arquivos...';
  Font.Size := 10;
  Font.Style := [fsBold];
  Transparent := true;
  SetBounds(90,120,300,30);
end;

procedure CurStepChanged(CurrentStep: TSetupStep);
var
  StatusLabel: TLabel;
begin
  if (CurrentStep = ssPostInstall) then
  begin
    WizardForm.StatusLabel.Setbounds(StatusLabel.Left, 
    StatusLabel.Top, StatusLabel.Width, StatusLabel.Height);
    StatusLabel.Hide;
  end else
    StatusLabel.Show;
end;

That answer your question?