You can install GoReserva patch installer (update old version to new version) easily from Joomla Super Admin.
Step 1: Click Extensions > Extensions Manager
Extract zip file and you can found available patch installer in zip file and install install one after another.
If you need any help with installation and configuration or if you have any question please send us email.
GoReserva is most powerful on demand online hotel booking and reservation system for Joomla 2.5.x offer unlimited hotels, hostels, guest house, apartments in one joomla hotel booking system