*BUMP*

I think I found the issue with the engines and it isn't FSUIPC surprisingly. If you change the fuel load in the manifolds you need to double check the flight engineer's panel as I've found that the panel changes when you change fuel loads. Make sure that the APU Generator is connected to the sync bus. Also, check that the Bus Tie Breaker and Generator Field Relay switches for all three engines indicate closed. The Generator Breaker Light can be ignored until you fire up the engines because when you connect the IDG to it's bus it will disconnect the APU generator from the sync bus. Then run through the engine start checklist making sure that the appropriate galley items are load sheeded and the engines should fire up without any issues.