A new alpha version of the mod is now available from the downloads section. Several severe AI bugs were fixed as well as some events that were broken by the FTM->TFH switch. Tank doctrines have been updated to use the TFH CA system, and the CA types have been assigned. The new Trade Theater system has also been implemented; Spain now has to use ships to trade with Germany, and Germany will have to use convoys to trade with Sweden or the USSR. Expect to see much heavier convoy traffic.
The mod is still in an alpha state and we expect there to be bugs and possibly crashes. If you follow the install instructions to the letter then it will start up without any problems; I'm testing with the exact same download you guys will get and follow the instructions I wrote down in the download section and can start up the mod with no problems, so if you're getting startup issues then go double-check the install instructions. Once the game starts though, there may be crashes and buggy AI behavior. If you get a crash or see the AI fall asleep or build/research something silly then PLEASE comment here, in the ModDB forum for the HPP (check out the forum link to the upper-right, next to images), or the mod's main forum (official page in the mod's profile to the right) telling us what happened. The more detail you can provide the faster we can fix the bug or crash.
For AI-related bugs, it would help tremendously if after you quit the game you would go to the folder Documents\Paradox Interactive\Hearts of Iron III\HPP\logs, open the file system.log in notepad or some other editor, and check the bottom of the file for errors. This file is deleted every time you start the game, so please look at it and report any errors at the bottom before you start the game up again if you saw the AI fall asleep. If you do see any errors please report them, because the errors will point to the files we need to fix.
Also, please keep in mind that generating the map cache can take a long time and hog up a bunch of memory. If you have an older computer, you may want to go to Documents\Paradox Interactive\Hearts of Iron III\HPP\map (make this folder if it doesn't exist) and copy your vanilla Documents\Paradox Interactive\Hearts of Iron III\map\cache folder to that location. This will bypass the map cache generation. You'll lose out on the visual region changes (the thick black borders on the map), but nothing else.