[IOOI]

You must have figured it out by now, but there's a way to use blindfire in conjunction with a MOH:Airborne cover system. That means you don't need sticky cover of any sort. Though, naturally, some objects heights will have to be accounted to allow the use of blindfire, since it might be possible to use blindfire when standing up or crouching.

Now, the cover system in MOH:A works by pressing the RMB (allowing to aim down the sight) and then using WASD keys to peek/lean. In the case of a game like DX, to peek/lean without a weapon in hands you'd need to holster it first.
Blindfiring would work by pressing a button (eg: Left Alt/C key), using WASD keys to extend the arm and put the gun around the cover piece (W/S=Above/Under; A/D=to the sides) and then shoot by pressing fire (left mouse button).

The best thing of this system is that, besides blindfiring, you can threat (extend the arm and put the gun around the cover piece) without exposure and without firing. (And of course, no need for sticky cover - at least on the PC, it would work well.)