Complex sentence: They are given extensive genetic modifications (called "boosting"), along with psychological conditioning in the form of a Virtual Reality simulation (the Bushmiller process) that teaches them how to handle and use their new powers.
Split into simpler sentences: They are given extensive genetic modifications (called "boosting"). This is paired with psychological conditioning in the form of a Virtual Reality simulation (the Bushmiller Process) that teaches them how to handle and use their new powers.