http://ppckitchen.org/Downloads/DevFiles.Unsupported.
As a general statement, if you don't know and can't figure out how to apply these files, you probably shouldn't be trying to use them. That being said, here are the short form directions for what's there right now:
Update to current revs using updater.
Replace your projects/groups dir with the one provided.
Replace the same named files in your buildos dir with the ones provided.
Replace the same or similarly named files in your kitchens dir with the ones provided.
**You probably don't need all the .rars in kitchens. Please don't waste our bandwith**
These files WILL BREAK all existing projects you might have saved. On the plus side, it's easy to fix them. Compare to a new project file to see what you need to do. If you can't figure it out, you lack minimum skills: delete everything, reinstall buildos.msi, and wait for a regular release.
Um, no. Not for this. That's for stuff that's much more stable/tested. If one wants to live on the edge, one needs to have some basic skills. Having to manually install these files is more or less a test of those skills.