The Take On Helicopters Game Updates Page now offers a new "Downtown" patch to update Bohemia Interactive Studios' helicopter simulation to version 1.06 (the Steam version will update automatically). This includes a free Take On Helicopters: Rearmed update that integrates Arma 2 content into the game, though they note that this "is a bonus project for supporters of our various games. Not all content merged will function fully correctly, and we can only support the most striking issues." Here's word:

Take On Helicopters: Rearmed is a free official DLC for Take On Helicopters. It seamlessly merges Arma 2 and Arma 2: Operation Arrowhead content into the game. Fly your helicopter over the gorgeous autumn landscape of Chernarus, dodge incoming fire from a myriad of Anti-Air weapon systems, and fight in massive combined arms operations.

Take On Helicopters: Rearmed is installed automatically together with the Downtown patch, which in itself brings various improvements to the game. Owners of legitimate versions of our military games will see the content included the next time they launch Take On Helicopters.