It makes changes to sacrifice rooms, black markets, item rooms, and starting rooms. Gives you 4 items in your starting rooms. Makes it so there are no hearts in Angel or Devil Deal rooms.
How to install: Extract the .zip folder, and put the rooms file in BOI rebirth resources folder. It should be at C:\Program Files (x86)\Steam\steamapps\common\The Binding of Isaac Rebirth\resources

October 2017: Im not working on this anymore if it wasnt obvious from the 2 years without doing anything