  In [7], a new iterative method for solving linear system of equations was
presented which can be considered as a modification of the Gauss-Seidel method.
Then in [4] a different approach, say 2D-DSPM, and more effective one was
introduced. In this paper, we improve this method and give a generalization of
it. Convergence properties of this kind of generalization are also discussed.
We finally give some numerical experiments to show the efficiency of the method
and compare with 2D-DSPM.
