Alt D/L: http://www.mediafire.com/?71ly5k666hcmrb1
1) Install Victoria II (if you don't have it already-- if you do, and it's been patched, skip to #4).
2) Patch to 1.3. (I usually make a copy of the game directory at this point).
3) Unzip the 1.4beta (currently 26 September) package over your Victoria II directory. *IMPORTANT*
4) Unzip the current PDM version over your main VicII directory. Overwrite existing files (this can be done over previously existing versions of PDM).
5) Delete the contents of Victoria II\map\cache (this is necessary the first time you load only).
6) Download a copy of Monster Magnet's Power Trip - the whole album. You'll thank yourself for it later.
7) Start Victoria, let it rebuild the map cache.
8) Start the game again. Compare the checksum to make sure you've installed correctly.