1.
Код:

cmdow @ /HID
@echo off
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:
START /WAIT %CDROM%\install\sav\COMPANY1.exe
START /WAIT %CDROM%\install\sav\sav.exe
START /WAIT %systemdrive%\Install\SAV\SAV.msi /QN RUNLIVEUPDATE=0 REBOOT=ReallySuppress
RD /S /Q %systemdrive%\Install\
EXIT
Или
2.
Код:

cmdow @ /HID
@echo off
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:
START /WAIT %CDROM%\install\sav\COMPANY1.exe
START /WAIT %CDROM%\install\sav\sav.exe
START /WAIT %systemdrive%\Install\SAV\SAV.msi /QN RUNLIVEUPDATE=0 REBOOT=ReallySuppress
START /WAIT %systemdrive%\Cleanup.cmd
del %systemdrive%\cleanup.cmd /s /q
EXIT
и
Код:

cmdow @ /HID
RD /S /Q %systemdrive%\Install\
EXIT
Имхо первый вариант удобнее