Have you posted on www.ancestry.com/community and http://genforum.com
An ALL site for research in Slovakia:
www.iabsi.com/gen/public
www.surnamenavigator.org
Backi Gracac is in Serbia.
http://en.wikipedia.org
www.genealogienetz.de/reg/ESE/dsinfo.htm Check the site for the church records.
www.yugoslavroots.com
www.croatia-in-english.com/rj/index.html