Projective Texturing Problem

I''ve been messing around with projective texturing to test the theory, so this is the matrices that I used : MatLightView x MatLightProjection x MatScale x MatTranslation and it actually work but with a minor setback, which is : - the texture is projected upside down - I can''t change the size of the projection, hopefully if I move the light source position further the texture should be projected smaller. - I have to divide the texture coordinates with 100 to get the result (which I found out later). I don''t know much about the math behind this and I''ve been reading various stuffs each gives a different formula, can somebody tells me what''s wrong ?? Any info will do.. Thanks