Hi aburley.

This - CIVA INS - THE ONLY THREAD PLEASE - would be the best place to look for the info you need or to ask question about the INS.

As for fueling the 707, start by filling the tank furthest out towards the Center tank.
Examples
75% fuel = Center Tank 41.6%, Left Tank 100%, Right Tank 100%, Left Aux 100%, Right Aux 100%, Left Tip 100%, Right Tip 100% = 119945.3 pounds of fuel.
25% fuel = Center Tank 0%, Left Tank 5.5%, Right Tank 5.5%, Left Aux 100%, Right Aux 100%, Left Tip 100%, Right Tip 100% = 40009.7 pounds of fuel.

Notice that the tanks closest to the center of the 707 have the least amount of fuel starting with the Center tank (at the 25% fuel load, it is empty).

Mark

aburley wrote on Apr 9^th, 2012 at 6:30pm:
Sorry aburley.

You are right in saying that it is not an INS question, as a question about the 707 itself, so I apologize if I made it sound like you should have posted it in the thread I mentioned. Because I didn't load the 707 into FSX and take a look at what you are talking about (I was flying a long haul flight in another aircraft and so I couldn't do that). I'll try to take a real soon.

Mark