The Blue Marble files in this version of BAT default to high resolution.  If your graphics card is older, or you are having difficulties with the hi-res textures, you may enable the low resolution Blue Marble graphics in one simple step.  

In the BAT 2.2\Assets folder, rename the BM_v4.50_HI.FPK file to BM_v4.50_HI.FPK.BAK.

Then rename the BM_v4.50_LO.FPK.TMP file to BM_v4.50_HI.FPK.

Restart the game with low resolution Blue Marble.

Enjoy! 