The movie Bitch Slap will be released on Blu-Ray on 10 July 2012. Renee did a cameo in the movie with her Xena co-star Lucy Lawless. Renee was Sister Batril and Lucy was Mother Superior in a Catholic convent.
The movie was directed by Rick Jacobson and starred Julia Voth, Erin Cummings and America Olivo. You can pre-order the Blu-Ray from Amazon.com
Here is the video of Lucy (Mother Superior) and Renee (Sister Batril)
There is also a hysterical "interview" with Mother Superior and Sister Batril. Please note: don't drink anything while you are watching this. These are just too funny esp around 1:38 into the clip.