It would be a huge step backwards to have such a feature. Aces High compared to other sims is pretty easy going on system specs, I keep a copy of Aces High on my laptop which only has 8MB of video memory. If you have problems with your system post your system specs, maybe we can help suggest a setup to get you up and running other than that then I'm afraid the answer is to upgrade, not to try and turn the clocks back.