It is highly recommended that you wait until the final patch is released!
The links are below mainly because the patches include un-patch data
These patches are very initial versions and nowhere near complete!
They do not represent the quality of the final release
How do I use .pff? (From FAQ)
You can use a program such as PPFoMatic3. A backup of the original game is recommended. Also make sure that your game file isn’t set to read only. The patch will only work with an unaltered original backup, should be easy to get from a UMD.