how to build a inno setup installer run as administrator

[Setup]
PrivilegesRequired=admin

how to add Serial Key to inno setup wizard

how to add read me page to wizard

how to add agree and dis agree button to wizard page

how to create a desktop short cut

[Icons]
Name: {commondesktop}\{#MyAppName}; Filename: {app}\setup.exe; WorkingDir: {app}; IconFilename: {app}\images\setup.ico; Comment: "software";

how to create a installation log file in inno setup installer

how to build a installer which installed in program files in both 64 and 32 bit machines

[Setup]
DefaultDirName={code:GetProgramFiles}\{#MyAppName}

[code]
function GetProgramFiles(Param: string): string;
begin
  if IsWin64 then Result := ExpandConstant('{pf64}')
    else Result := ExpandConstant('{pf32}')
end;