AccuSim is not available for any of the aircraft on the WWII Fighters CD. Basically, the WWII Fighters CD aircraft (and the SOLO line of downloads, for that matter) are the Wings of Power II generation for FS9 and FSX. The AccuSim line was initiated much later.
The new AccuSim line--of which there are only four aircraft: the Boeing Stratocruiser, the Boeing B-17G Flying Fortress, the Piper Cub and the "Wings of Power 3" Republic P-47 Thunderbolt--are later generation models for FSX only. The AccuSim features are separate expansion packs for each of these payware models; in other words you'd have to buy the B-17G base model and also the AccuSim expansion pack for that model.
For your WWII Fighters CD aircraft, you'll have to control the fuel quantities from either the setup menu when you choose your aircraft/location/time/season, or through the in-game menu. You can access the in-game menu by pressing the ALT key. After that, Aircraft--> Fuel and Payload.
FOV can be changed with the - and + keys on the main keyboard. Some cockpits may zoom back further than others by design, however.
_________________I like Thunderbolts!
(Link to MySpace tribute page)120th Fighter Wing, Montana Air National Guard