See Post #3 for full details and links
This DLC is accessed through the mod selection drop box in the start window. It is therefore incompatible with other such DLC and mods, including Dies Irae.
User posted link to patch for FtM 3.05, as official link broken:
I happened to click on a GamersGate link I'd only just noticed, and I saw this. So what's actually in it? Is it a Paradox job, or one they're publishing on the behalf of a community group?
Edit: Here's the product description:
Edit 2: Thanks for the answersCommon Weapons of WWII is a new units and technologies Downloadable Content for Hearts Of Iron 3. Common Weapons of WWII features about fourty common and country specific units and the relevant techs to active and use them on the field. If you like History feelings or love micro-managing your battles, Common Weapons of WWII is what you need.
From the infamous Waffen SS or Red Guard brigades to the specific purpose units such as Assault Gun, Colonial Infantry, Glider Anti Tanks and Light Tanks brigades (paradrop units), Escort Twin Engine Fighter, specific Carrier Air Group (Interceptors, Naval bombers, Dive Bombers), Motorized support (Art., AT, AA) or Light, Medium and Heavy versions of Tank Destroyers. And a lot more!
This is a piece of work by Devildread, a member of the community. It installs as a mod, so to use it make sure you select it from the drop menu before launching HoI3. If it installed successfully and it's not there when you play, that's probably the problem. It runs seperately to your main install, so you'll still get to choose between vanilla and the new features offered.
Edit 3: Devildread has posted a beta patch based on feedback in this thread.
Edit 4: New beta patch of what will hopefully be the release version
Edit 5: As of 31/1/2011 DLC crashes on brigade selection playing with game version 2.04c. Fix hopefully out within a week. No problem with version 2.04b.
Edit 6: New patch is up
Edit 7: 30/7/2011 new 2.0 beta patch up, with FtM compatibility and a new unit - Royal Marine Commando
Edit 8: User made German localisation patch posted here
Edit 9: 2.1 patch out here