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centre of texel

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Anyone know how to get the value used to offset the texel coords in directx? Basically you can''t use coords 0,0 for top left since bilinear filtering will pickup some of the bottom right texels colour. The value to pull them in by seems to be an abitary value depending on gfx card in question. (some is 0.375, other 0.5 etc..) Worse still some cards allow the user to tweak the actual centre of the texels! (see gforce cards in the display properties->advanced). Anyone know of a way to fix this other than turning off bilinear? Thanks.

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