WinRAR

Download: WinRAR

Copy the downloaded file to \$OEM$\$1\install\Applications\WinRAR\

Unattended XPCD

Add these lines to your batch file:

ECHO.
ECHO Installing WinRAR 3.20
ECHO Please wait...
start /wait %systemdrive%\install\Applications\WinRAR\wrar320.exe /s


Using /silent instead of /s will show the following screen when it completes:

Unattended XPCD

Followed by opening a folder containing the WinRAR shortcuts. It's up to you whether you want to use /s or /silent.