CompuServe Messages

I've run into a bit of a problem with a 3DSr3 bump map. I've created a material which contains a bump map which is a 5mb TIF file depicting a very hi-resolution greyscale relief map of the world. From that same TIF file, I've been able to create mesh objects for each land mass. I'm now trying to accurately align the bump map with the land mass mesh objects. (I've successfully done this before on a smaller scale with a single country or continent). I'm running into trouble this time, however, because I can't make the bump map match the scale of the meshes. No matter how large I scale the map, it still seems limited to what appears to be a highly zoomed-in subsection of the map, not anywhere near the whole thing. I'm guessing that I'll need to substitute a much lower resolution version of this map (one is available). My reason for preferring the hi-res version is for clarity when I render zoomed in close-ups of some of these landmasses. Am I missing some capability of 3DSr3 to help me avoid substituting a much lower resolution bump map file? (I'm planning to render at 640×480, but I suspect this map is more like 2,000×2,000 or more.) For whatever it's worth, I'm running a 486/66 with 32mb of RAM. Thanks for any input you can provide. Gratefully, Lee