Код:

mode con cp select=1251
SET folder=I386\SVCPACK

FOR %%d IN (c d e f g h i j k l m n o p q r s t u v w x y z) DO IF EXIST %%d:\WIN51 SET CDROM=%%d:
SET KEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx
SET i=100
REG ADD %KEY%\googletalk /VE /D "Установка Google Talk " /f  
REG ADD %KEY%\googletalk /V 1 /D "%cdrom%\%folder%\googletalk.exe" /f  
SET /A i+=1
mode con cp select=866
exit