I'm attempting to do a clean install of Mavericks on my mid-2009 13-inch MacBook Pro. I don't have a Super Drive in my MBP as I replaced it with an extra HDD. I'm using a flash drive as an install disk for Mavericks and it covers the other USB port making it impossible to even use a wired mouse (even though I don't have one). For some weird reason, I can't click with my trackpad now so I can't click on the install button. Switching options with the keyboard is doable but I can't get past the final button. Any ideas?