Matrix Stacks

Well, I''m interested in creating a matrix stack. I know what they do and all, however, my documentation currently has no notation about how to make one. I have created a multi part model and exported it in *.X format, and I have a different model for each body part. I know how to ascend and descend within the heiracheal (Sp) Model, using the push and pop methods, but how do I tell it to sequence the parts in order. Not only would I like to know the code, but i''d also like to know where the code goes, seeing as how I R T3H UBER N00B. ~Griffyboy0~