Copy.ipk file to USB, connect USB to box, it will be automatically recognised and small window appears. Press OK and follow steps for install addon.
If something wrong go to Menu - Setup - Software management - ipkg-install and choose your USB Flash Drive and update box with this .ipk file. After that you will be able download emulators directly from web via Menu - Plugins - Donwload plugins - Addons. Key update you can choose in Menu - Allinone Panel - Script Executor - keyupdate (than press red button for execute)
If something wrong go to Menu - Setup - Software management - ipkg-install and choose your USB Flash Drive and update box with this .ipk file. After that you will be able download emulators directly from web via Menu - Plugins - Donwload plugins - Addons. Key update you can choose in Menu - Allinone Panel - Script Executor - keyupdate (than press red button for execute)