CSF2 can help you in Aces High if you choose the right planes. For ACM, grab the stock Corsair with all realism options on and set up a Quick Mission to go after Zeroes that have an advantage. This will get you used to defensive fighting and pulling lead in turn fights, as well as managing energy, maintaining Situation Awareness and such like that.
You can also use the stock Corsair for practicing ground strafing and landing procedures.
For more advanced dogfighting stuff, you'll want to import some of the 1% planes from
http://www.avhistory.org which give a more challenging flight model (and purportedly more realistic).
For working on my Aces High gunnery, I attack the circling drones from a near head-on approach or from a sharp deflection to work on my snap-shots. My gunnery has improved as a result.
When you fly Aces High, work the Spitfire IX for dogfighting and the P-51D for high-speed fighting.
As for Robert Shaw's "Fighter Tactics" book, its pretty dry reading that'll give you a headache if you're not ready for it. Stick with "Aircraft vs Aircraft" by Norman Franks (now on the Bargain Book racks of Barnes and Noble stores) if you want full-color pictures and diagrams, or the Mike Spick books "Luftwaffe Fighter Aces : The Jagdflieger and Their Combat Tactics and Techniques" or " Allied Fighter Aces : The Air Combat Tactics and Techniques of World War II" if you want a book that'll fit in a backpack.
You'll also find it useful to comb through the guide at
http://www.netaces.org to get some set-up advice.
And the only reason to have CFS1 around is to import the planes into CFS2.
