So this is essentially the same problem as before, just with more vertices and loops. You now have to label each edge of the circuit with i1, i2, i3, etc., and you can assign directions arbitrarily. However once you assign them, you have to stick with that direction through the whole problem. You can, of course, reverse the arrow in your equation by writing -i instead of i. After you assign all the edges with names, you can do the same thing as before and get vertex equations and loop equations.
In your circuit, if you want, you can collapse node 0 and 1 immediately by adding resistances.