Begin by selecting a primary WFE server and run through the initial installation. This installation program will copy a handful of files local to your current server. Included in this list of files are two SharePoint Solutions Files (WSP) files. At the end of the installation the SharePoint Solution Installer will be executed and will deploy the WSP contents to the selected Web Application. The solution resources will then be published to each server in your farm by the SharePoint deployment engine. There is no need to run the program installation on each WFE server.
Once the solution installation is in place you will be required to install a Trial or Production license on each WFE server in your farm. The license installation has a separate installation program. The licence installation is required on each WFE server.