Welcome Over Flanders Fields, Gregg.
If you are into immersive campaigns and single-player action, you made the right choice.
In OFF, everything is really there all the time, while you fly - not just spawned.
You'd find other aircraft everywhere else, away from your path.
That's real immersion IMHO.
What graphic card do you use?
Your CPU should be able to run the sim. Best advice I can give you is, to check the "Sticky Threads"
with lots of advice, in the other forum - see here:http://combatace.com/forum/204-off-general-discussion/
and of course the OBD Website:www.overflandersfields.com
There is all the guidance which is important for installing everything in the right order etc.
It is a lot of stuff you may have to read through, but once your sim is running fine
(and we won't let you alone with any possible problems), you will be the happiest WW1 flyer
on the planet - well, one of them. Among the other OFFers.