In game, press ALT R to start recording (little red R in the upper left corner of your screen). This will dump an film##.ahf file into your HTC/Aces High II/films folder. You can view those films with the AH Film viewer. START > PROGRAMS > Aces High II > Film Viewer, then open the film. (after the first time running its automatically associated with the .ahf file extension and you can simply double click the film to view it).
I usually watch the films in external, with use recorded views, trails and icons checked. That way youll be able to see what your opponent did, and why what you did worked or didnt work. You can also "jump" into your opponents plane by double clicking his name on the right hand side list.
If you need help with analyzing your films, post them here (small file sizes can be hosted at
http://www.onpoi.net/ah/ ) and ask for comments/help. Or ask me to PM you my email address, then you can send me the film and ill tell you what i think.