From what I understand (I am in no way an expert) the "Kommandogerät" (verbatim: control device) acted as a primitive computer. The pilot only had to operate the throttle lever, and this gadget would make the proper adjustments (manifold, mixture, etc...) Later versions of the 190 gave the pilot the ability to override the automatic setting, to boost power in emergency.
That's what I know...the engine management buffs can prolly tell you more.

As for trim I dunno. I ve read a post war analisys of the 190 and the 109 done by a british fighter pilot. He pretty much said the 109 was pushed over its limits with the G version and was terrible to fly. Rudder trim was non-existant so supposedly the pilot had to constantly apply pressure to one rudder to fly straight.
He was pretty impressed with the 190 though: "every bit a fighter" were his words.
I remember that he mentioned that the 190 had no trim either (dunno if only for 1 axis of movement or all) but that it didn't need it cause the design was so good.
I lost the link to that evaluation but I'm sure that some kind soul out there still has it.
BTW: The german company "Flugwerk" are rebuilding a 190 A-8 from the original blueprints. So they should know this bird like nobody else.
Maybe a good idea to drop them a line and ask for an evaluation when you guys at HTC start to sit down and model the 190.. *hint, hint*
http://www.flugwerk.de Sascha JG 77 "Herz As!"
[This message has been edited by Sascha JG 77 (edited 09-22-1999).]