No offence but you went onto the ORBX forum and ranted at them about how bad you think their addon is and how it messes up your work. As a result you have been greeted with a stony silence. If you had told them politely what you were doing, how the London addon affected your work and had asked if they would be kind enough to mod their scenery I suspect they would have obliged in time.
You are a clever guy and very helpful with great work which we all benefit from but sadly I think you have probably shot yourself in the foot with a lack of diplomacy when dealing with ORBX.