I have never heard of a mesh causing fs to crash. Perhaps the mesh has a corupt file in it. Even if you were to have a area more than once FS would use the last one loaded. By that I mean each scenery has a level and a order in which it is loaded so if you had two it would simply overwrite the first with the second. If the mesh has more than one BGL file in it try removing all but one and see if you still have the problem. Then put them back one at a time trying after each file is put back. If it only has one bgl file it may be corrupt try downloading it again. 8)
The scenery cfg file will show you what files it is using for each area just print it out it is in the main FS folder and is a TXT file. Then look through it to see if you use the same file more than once. But I do not think that would cause a problem. 8)

I agree it does sound like a texture problem try moving the texture folder out of FS and see what happens I have several mesh files that do not have any texture in them at all, I do not see where this would create a problem by removing them 8)