ok just dropping the extracted folder into anteworld folder didnt work! but then i went into your uppacked folder and took the sh2_fdm2 folder and put that into anteworld/jsbsim/aircraft folder and then dropped the 2 engine files into anteworld/jsbsim/engine folder and it works now!
just unpacking the folder straight to the anteworld folder wont work because it makes a sh2_fdm2 folder! if you named the .rar file "anteworld" you would be able to just unpack straight there as it would merge the folders!
anyway im sure the exporter will be updated to work better with aircraft now we know of this! thanks