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Point Sprites Revisited

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Is it just me, or is the Point Sprite sample with D3D 8 full of 95% unnecessary garbage designed to cloak the real demo of point sprite functionality? I''ve been looking through that soup for an hour now, extracting the (what I thought) necessary data and still can''t get my own point sprite experiments to work satisfactorily. Could someone point me to a clear example of the bare minimum of how to implement point sprites in my application? Or could they post some sample code here for me to check out? I''d appreciate that. Incidentally, I''ve been looking at the scaling functions and see that it uses square root calculations, surely that can''t be a good thing? Could I get more performance out of my own bulletin board system using matrix manipulation instead of the square rooted point sprites?

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