Yeah. Plug an Amiga mouse into the second joyport and hold down both buttons when you boot. You'll get the early startup menu and you can switch the Amiga into PAL in the Display Options menu.
You'll need a mouse/joystick switcher if you want 2 joypads and a mouse connected - it's not safe to unplug peripherals from an Amiga while it's on. This only applies if you want to play any 2-player PAL games, though.
