I understood the use of the program SU.EXE which makes it possible to install a program via script, without being obliged to give rights of admin to the user.
Only according to what I understood, it is necessary to set up a service by utility
SUSS.EXE. But to set up this utility, it is necessary to be an administrator! Which is the means simplest to implement this service
without entering heaviness.

thank you for your answers