Extremely terrible performance/FPS at KLAX

Does anybody know if there will be a fix for the low fps problem at Los Angeles International Airport on Flight Simulator X. I am currently using the latest version of Ray Smith's KLAX scenery and I have been experiencing terrible performance/low fps at this airport. I use FSPS Fiber accelerator and have tried reducing the graphics to try to improve frame rates, but I still get heavy stuttering/freezing/several minutes of my flight simulator being unresponsive, and this is kind of personal and embarrassing, but just a short while ago, I started a flight from Los Angeles to Seattle, and I veered off the runway during takeoff. Also had a rough landing at LAX earlier due to this issue. Any suggestions on what I can do to improve performance? I don't have my specs for my flight simulator computer readily accessible at this time, since I am typing this message on my laptop (which has windows 8 and doesn't have flight simulator x installed on it). I will provide the specs for my flight simulator computer later on if you need them.
In the meantime, I would appreciate any advice you guys may be able to offer me.
Evan
In the meantime, I would appreciate any advice you guys may be able to offer me.

Evan