how do i create .vismat files?

hello everyone,

            i have downloaded .vismat files from asgvis.com...i would like to know why my vray material editor is not linked with su materials! i have su 8 pro and vray 6 i think

do i have to load the material everytime! wont it be there in the materials?

i have downloaded vray materials ?where do i paste the .vismat files? can you please help me out! thanks in advance!

i mean i just give few values and a basic shape and it shows me variations! similar to grasshopper

what about the parametric plugin

i have just got into the plugin thing ! i am looking for make faces plugin ! i have downloaded it from http://www.smustard.com/script/MakeFaces! and pasted in the plugin folder but i cannot find it in plugin section of my program! do i need to downl;oad anything else to make this work? i am also looking for a parametric design plugin which is hopefully free! my mail id is vishnureddy331@gmail.com ! thanks in advance!