bmp -> dds

This question has probably been asked, but lo, I find nothing that fits exactly.
So here's my issue.
I've bought I couldn't tell you how many 3rd-party aftermarket aircraft, and quite a few of them still use bmp textures.
FSX seems to want dds textures when using DX10 preview. I've heard it thrown about that it will use bmp's only after searching 2 other places for a dds.
I am not finding this statement to be true. I have quite a few aircraft that use bmp textures, that display all white with no textures (everything else, though, it seems).
I can uncheck the DX10 preview option and they display fine, but the model preview is not the only thing that suffers when I do that.
How can I modify/convert/something to these textures, or even alter the model to make the textures display with DX10 preview on?
Any help will be greatly appreciated. Thanks in advance.
So here's my issue.
I've bought I couldn't tell you how many 3rd-party aftermarket aircraft, and quite a few of them still use bmp textures.
FSX seems to want dds textures when using DX10 preview. I've heard it thrown about that it will use bmp's only after searching 2 other places for a dds.
I am not finding this statement to be true. I have quite a few aircraft that use bmp textures, that display all white with no textures (everything else, though, it seems).
I can uncheck the DX10 preview option and they display fine, but the model preview is not the only thing that suffers when I do that.
How can I modify/convert/something to these textures, or even alter the model to make the textures display with DX10 preview on?
Any help will be greatly appreciated. Thanks in advance.