Well, I shoot 135, but things will be the same.
check out
Strobist for an excellent site/blog about all things off-camera lighting. The lighting 101 section is quite good.
To start, you'll need a strobe, I'd recommend a Vivitar 285, gobs of power, built in 'calculator' and adjustments for manual power output. Stick it on a lightstand with a bogen/manfrotto umbrella clamp, and I'd probably say a 44" white shoot-though or silver reflective umbrella.
Since I'm pretty sure the 67II has a PC sync port, you'll need a PC sync cable of your choice, (I have 3 and 10 meter cords) and probably a PC-to hotshoe adapter for the vivitar; the hotshoe adapter screws into the umbrella clamp (which mounts onto the stand) and then the flash slides into the rails. the PC sync cable connects to a little sync cable coming out of the adapter.
That's good for one light, you can duplicate the setup and use optical slaves once you have the first strobe synched to the camera, assuming the lights can 'see' each other.