It's clear that you can't just give the user all the files of a program, and expect them to put them into system folders correctly, and do everything manually. It's better to give them just one file that, when run, will do it all automatically.
For this reason eInstall has been created, which lets you create simple installers that group all the files of a program, and then adds the necessary keys to the Registry. It also creates useful shortcuts to the application after installing it.
Also, and to avoid anyone manipulating the installer, eInstall encrypts the content, and so guarantee data integrity.
Save work for your users, and improve the usability of your programs, using eInstall to create simple installers.