BMP textures files on FSX

Hi budies!

I need to know what to do to have textures shown on FSX, for those freewares airplanes I download with BMPs texture files. Some say they fly with no difficulties, and have textures on the airplanes. Some other say I need to turn off DirectX 10 from my machine... How do I do that?

Is there anybody willing to give a hand on this?

Thanks in advance.

I took this off the net, look at the area that's circled.
Uncheck the DX10 box.

http://www.justflight.com/images/dx10_000.jpg