well you just opened up a can of worms...
1. I disagree with your first statement... I find FS2004 better, because I didn't have any of the 5 problems I initially listed (btw my FSX framerate seems okay). However, I suppose you still may argue that I have computer issues, which brings me to my next point...
2. From my understanding I have a Dual Core Pentium E2160, and under my sys info it says its 2GHz, although when I google it says 1.8 so who knows. I'm not sure if it's a "Quad," I don't think so.
3. This his been the most frustrating thing... SP1 & Acceleration, I tried that, and the problem I have is with my video card, Acceleration won't even try to run with what I have. So right now I'm running FSX with SP1 only... now I do understand that they have SP2 for users who are not running acceleration, but the problem is that since I "activated" acceleration, my computer seems to be stuck in thinking that it is still installed even though it isnt. Subsequently, when I try to install SP2 it says something like "can't install because acceleration is installed."
*I will add that I would upgrade my video card, but I'm not 90% or more confident that it will solve these problems (I even have issues with sound). Also, I can try uninstalling and reinstalling again, however I don't think it will help because once the software is "activated" windows seems to be stuck in thinking its still there.
God forbid you try to run a microsoft program on a microsoft operating system.