This is an off topic reply to Bjoern.
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It looks like all that's needed is FSX Mission Editor and its SimVars client. Will the free version of FSXME do?
Your experiences sound interesting enough to play with a simple, commandable, wingman AI (with dogfighting capability). With some synthetic speech to acknowledge commands or announce kills, it could make military flying in FSX a lot more attractive to me.

Is it also possible to trigger an action when the AI aircraft is within a certain cone in front of your aircraft as to simulate gun kills? What about tracking events, e.g. for a tally? And more than one wingman?
Do you have a simple example mission using AI wingmen that I could analyze?
Answer to all of your questions is, Yes.
Free FSXME just have a limited number of actions and nodes that you may
use for making a mission, but enough for what you're asking.
I use "Instant Mission Maker" though, since UI is selfexplanatory while
I'm building a mission and I'm changing mission.xml by hand to add
functions that IMM doesn't support (like custom actions that use Jim's Simvar,
amongst others - Few certain actions or complex statements of the type "If A and/or B then.."
is only hand made, based in MS mission SDK, anyway... ).
Maybe try and fly the "BGV" missions to test and see this in practise.
(BGV can be flown with any plane and any AI wingman and hostile AIs
from user's inventory) :
http://simworksstudios.com/forum/index.php?topic=329.0
Just have a look at features list at that post, that answers your questions, as also in this
video, you may see most of the scripted mission features of BGV mission in action
(and with human made voice overs, not synthesized - or even used by other sims):
But BGV to work, needs some work - input by the user. A much simpler "theater" is
the WWI Verdun I released here in SOH, that is just install and fly it.
You'll be dogfighting against 2 AIs that can damage you and shoot you down.
Now, for a simple mission to analyze, I'll make one for you when I'll have the time,
currently engaged with too many stuff for my v-squadron and JoinFS MP.