Radar Cross Section - Method of Moment

Hi everybody,
i am a student in internship and i have to deal with RCS computation.
I have got problems with numerical methods (method of moment and finite difference method) : i've got the theory but cannot compute this on matlab ....
I saw a lot of paper using MoM algorithms but cannot find them.
Have you any reference on those matlab algorithms ? Any paper on RCS and method of moment ?

Another problem : how can I use PO and GO cards in FEKO ?

Thanks for your help !