I patched the world trade so it does not require a holo/density scanner anymore. If you have one, it uses it, otherwise, it doesn't. Click on the zip file below to install the patch. It is 2 .erx files. just overwrite the ones that are in the same directory as attac.exe.
This patch will be in release v4.1.7
earth.
http://www.tw-attac.com/downloads/worldtradefix.zip