Transfer the pkgi to any folder in the USB drive that just popped up when you connected through the USB.Note: If you are using SD2Vita, change the USB device to SD2Vita. Press O to cancel main settings and then press select to connect your Vita to your PC.Back on your Vita, launch Vitashell, press Start and change ' SELECT button' to USB.
Step 2: Launch Vitashell and Connect via USB.