diff --git a/winehelper b/winehelper
index def5032..d995b42 100755
--- a/winehelper
+++ b/winehelper
@@ -2126,6 +2126,19 @@ select_component_version() {
     done
 }
 
+run_install_to_prefix() {
+    export WINEPREFIX="$1"
+    local WIN_FILE_EXEC="$2"
+
+    if [[ -z "$WINEPREFIX" ]] || [[ -z "$WIN_FILE_EXEC" ]]; then
+        fatal "Использование: $SCRIPT_NAME install-to-prefix <имя_префикса> <путь_к_установщику>"
+    fi
+
+    check_prefix_var
+    prepair_wine
+    wine_run_install "$WIN_FILE_EXEC"
+}
+
 run_install_dxvk() {
     local version="$1"
     if [[ -z "$version" ]] ; then
@@ -2258,6 +2271,7 @@ case "$arg1" in
     winetricks) prepair_wine ; "$WH_WINETRICKS" -q "$@" ;;
     desktop) create_desktop "$@" ; exit 0 ;;
     install|-i) run_autoinstall "$@" ;;
+    install-to-prefix) run_install_to_prefix "$@" ;;
     install-dxvk) run_install_dxvk "$@" ;;
     install-vkd3d) run_install_vkd3d "$@" ;;
     change-wine) run_change_wine_version "$@" ;;
diff --git a/winehelper_gui.py b/winehelper_gui.py
index 89a46b8..ac87600 100644
--- a/winehelper_gui.py
+++ b/winehelper_gui.py
@@ -2440,7 +2440,7 @@ class WineHelperGUI(QMainWindow):
         self.prefix_install_button.setEnabled(path_ok and prefix_selected)
 
     def run_prefix_installer(self):
-        """Запускает установку файла в выбранный префикс."""
+        """Запускает установку файла в выбранный префикс через скрипт winehelper."""
         prefix_name = self.current_managed_prefix_name
         installer_path = self.prefix_install_path_edit.text().strip()
 
@@ -2451,9 +2451,6 @@ class WineHelperGUI(QMainWindow):
             QMessageBox.warning(self, "Ошибка", "Указан неверный путь к установочному файлу.")
             return
 
-        prefix_path = os.path.join(Var.USER_WORK_PATH, "prefixes", prefix_name)
-        wine_executable = self._get_wine_executable_for_prefix(prefix_name)
-
         self.command_dialog = QDialog(self)
         self.command_dialog.setWindowTitle(f"Установка в префикс: {prefix_name}")
         self.command_dialog.setMinimumSize(750, 400)
@@ -2477,13 +2474,12 @@ class WineHelperGUI(QMainWindow):
         self.command_process.readyReadStandardOutput.connect(self._handle_command_output)
         self.command_process.finished.connect(self._handle_prefix_install_finished)
 
-        env = QProcessEnvironment.systemEnvironment()
-        env.insert("WINEPREFIX", prefix_path)
-        self.command_process.setProcessEnvironment(env)
+        # Окружение полностью настраивается скриптом winehelper
+        self.command_process.setProcessEnvironment(QProcessEnvironment.systemEnvironment())
 
-        args = [installer_path]
-        self.command_log_output.append(f"Запуск установки: {shlex.quote(wine_executable)} {shlex.quote(installer_path)}")
-        self.command_process.start(wine_executable, args)
+        args = ["install-to-prefix", prefix_name, installer_path]
+        self.command_log_output.append(f"Выполнение: {shlex.quote(self.winehelper_path)} {' '.join(shlex.quote(a) for a in args)}")
+        self.command_process.start(self.winehelper_path, args)
         self.command_dialog.exec_()
 
     def _get_prefix_component_version(self, prefix_name, component_key):