There's a DirectX Caps setting to get your card's ability to handle non-square textures. Perhaps Tom has this in one of his DLL's, I don't know. I think it's called D3DPTEXTURECAPS_SQUAREONLY and I'm pretty sure that only ancient videocards have it set. I've used non-square textures in all of my games, and I've never had an error report related to it, nor have I had issues with blank areas appearing where textures have been automatically resized. So I'm very confident that you won't have issues with non-square textures, providing you stay within a ratio of 1:8 or 8:1.
Texture Size power of 2
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