Do you have the standard jack with the little cut out piece that jacks on the side rail of the car? The correct way to jack the car, as far as I kno, is to jack the car and stand it with stands that have an attatchement very similar to the jack top. I've seen it somewhere, they show the adapters and supporting it on 4 sides on the rail
Now I know your not going to have them or really want to aquire/make some. So I always jack the front from the crossmember and stand on the crossmember further out. At the back, jack from the diff and stand where the lower control arm meets the body (from memory)
not sure if this is the answer your looking for but thats how I do it (This is for an R33 BTW, R32 could be different)