I was reviewing how the Vistex add on was installed on SAP and I learned a basic information I did not know: SAINT
SAP and other companies offer a wide range of add-ons that you can use to enhance your standard SAP system, it can be Industry Solutions, plug-ins, or customer-specific development projects.
SAP Add-On Installation Tool (transaction SAINT) enables users to install and upgrade add-ons directly from their standard SAP system.