The general syntax for installation of Internet Explorer 7 from the command-line is:

PackageName.exe /switch

Where PackageName.exe is the file you downloaded, like IE7-WindowsXP-x86-enu.exe and /switch is one or more switches, like on the following command line:

IE7-WindowsXP-x86-enu.exe /quiet /norestart

The Setup switches are:

 /passive      - No user input is required.                                               Windows Genuine Advantage validation occurs and updates are downloaded.                               /quiet        - The Setup user interface is not displayed.                                               Windows Genuine Advantage validation occurs and updates are downloaded.                               /update-no    - Setup does not download updates.                               /no-default   - Setup does not make Internet Explorer 7 the default browser.                               /nobackup     - Setup does not backup the files needed to uninstall Internet Explorer 7.                               /norestart    - Setup does not cause the computer to restart after the installation.                               /forcerestart - Setup forces the computer to restart after the installation.                               /help         - Setup displays a list of command-line switches.                               /log:<path>   - Setup creates the <path> log file.