Delphi 7, the installed component is hidden during installation

I am working on a component for delphi 7and for quick installation without having to touch. IDEI am making a simple installer according to this Marjan Venema SO answer .

    procedure TForm1.Button1Click(Sender: TObject);
    var
      sDelphi7PackageName : string;
      sDelphi7Path,fileSource,fileDest : string;
      sDelphi7packBPL,sDelphi7PathMenuBPL  : string;
    begin
       sDelphi7Path:=ReadRegistryValues('\Software\Borland\Delphi\7.0',FALSE,'RootDir',1,TRUE);{<-- returns the 'C:\Program Files\Borland\Delphi7' }

      {#1. Install .bpl}
      sDelphi7BPL:=sDelphi7Path+'\Projects\Bpl\Pack.bpl';
      WriteValueToRegisTry('\Software\Borland\Delphi\7.0\Known   Packages',FALSE,sDelphi7BPL,'Delphi 7 compo Bpl File'); {<-- writes to the registry}

      fileSource:=ExtractFilePath(Application.ExeName)+'\Packages\comPack.bpl';
      fileDest:=sDelphi7BPL;
      CopyFile(PChar(fileSource), PChar(fileDest), False);
      end;

It works great! [enter image description here] [2] C:\Program Files\Borland\Delphi7\Projects\Bpl\Pack.bpl. but installed id componenthidden

can anyone tell me how unhide componentto install?

EDIT

may be useful:

1) I already have a bplcomponent file , so I copy directly to the directory delphi 7 C:\Program Files\Borland\Delphi7\Projects\Bpland modify the registry HKEY_CURRENT_USER\Software\Borland\Delphi\7.0\Known Packages.

2) registercomponent procedure

 implementation
 procedure Register;
  begin
      RegisterComponents('comp', [Tcomp]);
  end;