[vek]

1.) если тихая установка, то поможет запуск рег файла: Ключи в WinRar 3.51. находились здесь:

Код:

HKCU,"Software\WinRAR\Setup\MenuItems","ExtrTo",0x10001,1
HKCU,"Software\WinRAR\Setup\MenuItems","ExtrHere",0x10001,1
HKCU,"Software\WinRAR\Setup\MenuItems","Extr",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","ExtrSep",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","OpenSFX",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","AddTo",0x10001,1
HKCU,"Software\WinRAR\Setup\MenuItems","AddArc",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","EmailArc",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","EmailOpt",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","Test",0x10001,0
HKCU,"Software\WinRAR\Setup\MenuItems","Convert",0x10001,0

1 в конце означала показывать в контекстном меню
0 - не показывать в контекстном меню

2.) Спец пак уже есть http://forum.oszone.net/thread-62016.html