Lanc

I use this soft first time and something I don`t understand, please explain me what does below things mean: %cdrom%\WPI\Install\Video\realalt.exe /VERYSILENT %cdrom%\WPI\Install\Video\realalt.exe /SP- %cdrom%\WPI\Install\Video\realalt.exe /S %cdrom%\WPI\Install\Office\Akelpad4.exe /P and tell me about other indexes if I didn`t write it here. Thanks!