Scenery problem in India in FS2002

Has anyone else seen this? I recently was flying from Bangkok to Cochin in India. The flight was fine until I got to about 80 degrees East. My frame rate dropped to almost zero, and FS2002 was running at 100% of the CPU. I tried re-starting on the coast of India, but the same thing happened at about the same point. I've also done it from the North. If I try to start a flight on the west coast of India, or as far away as Cairo or Johannesburg, it locks up immediately at "Loading Elevation Data" and the progress bar never gets anywhere.The last things I did were some sceneries for airports in Indonesia and China, but those areas work OK. The last "aggressive" scenery was Victoria Falls, with the FS2002 fixes. I can still fly there, too. I've backed that out, but I've still got a problem. I suspect some file has been corrupted, but I've got no idea which one. Any suggestions?