We use this method quite a bit.  I even teach it in my Computational Electromagnetics course.  

http://emlab.utep.edu/ee5390cem.htm

If you jump straight into the MoL lecture, you will probably not follow it.  You will have to look at previous lectures.  I recommend the following order:

Lecture 2 -- Maxwell's Equations

Lecture 3 -- Preliminary Topics in CEM

Lecture 4 -- Transfer Matrix Method

Lecture 5 -- TMM Using Scattering Matrices

Lecture 9 -- Perfectly Matched Layer

Lecture 10 -- Finite Difference Method

Lecture 11 -- Maxwell's Equations on a Yee Grid

Lecture 12 -- Finite-Difference Analysis of Waveguides

Lecture 24 -- Method of Lines

Sir,

Thank you for the reply. Yes, i would go through them. Can I contact you for any queries on the same as I am a beginner in this field, but I am quite interested on this topic. 

Sure

thank you very much sir

Sir, my requirement is to model SIW using anyone of computational methods in electromagnetics. Can you please suggest which technique i need to focus on. I have seen papers using different methods like MOM, MOL,FDFD, BI-RMEetc.

Thank you.