It's called either Pacific Fighters or IL2:1946. 1946 had a lot more planes.http://www.gog.com/en/gamecard/il_2_sturmovik_1946
is the link he is talking about. IF you look at the IL2 forum there is a lot of info.
The game is good, borderline great (the Original IL2 is an all time classic). There are a lot of unofficial (read mods) updates to the game that add a lot to the game but tend to muddy the waters for online play.
It is a good game to get your feet wet with. Traps are fun, some of the missions are cool but the campaign can be repetitive (dynamic but that doesn't necessarily work well in the pacific) and as I said before some of the things that I expect in the game, like some aircraft and ships arent present. But it still is very good and for that price you can't really go wrong.
I personally use Gogamer but I see they have it out of stock.