How to use pplane8 to illustrate the temporal dynamics of 2D FitzHugh-Nagumo model and find it's steady-state solution?

I've downloaded pplane8 to be used with MATLAB and I've done the necessary fixes to run it (and open the pplane window). Given the following FitzHugh-Nagumo model, how to do enter it into pplane8?

∂u/∂t=D_u∇^2u+λu-u^3-σv+κ

τ∂v/∂t=D_v∇^2v+u-v

The parameters are also given. How can I find the steady-state solution?