ok 2 problems with this otx file!
1: the 747-100 folder does not install to to jsbsim aricraft folder! (not sure if its ment to auto install it there? cameni?)
2: you have edited the JT9D-3 engine file meaning it will overwrite the original JT9D-3 file so will effect other planes using this file! you should rename the JT9D-3 to something else like falcon_engine! then edit the xml to point to that falcon_engine!
though to get it to work the way it is, just copy the 747-100 folder and paste it in:
C:\Program Files\Outerra\Anteworld\jsbsim\aircraft
this will be using the original JT9D-3 engine file though! untill an update is made!
EDIT: this thing wont fly for sh*t with the original engine file! can rename it to JT9D-3_OLD then drop the new one in! that will get it working untill update!
just remember once an update is posted, you will have to delete the new JT9D-3 file and rename JT9D-3_OLD to JT9D-3 again!