The diocese' website is very well put together and contains several useful resources to enable you to find the sacramental records of your ancestors. The resources below are found on their website. I hope you find them useful!
- Chronological List of Brooklyn Parishes, 1820-2011
- Chronological List of Queens Parishes, 1843-2009
- List of Closed Schools at The Diocesan Archives
Access to the parish archives is by appointment only.
The website of the Italian Genealogical Group also has a great article from one of their newsletters talking about the resources in this archive.