Using Povray with the test suite

I’m using LLVM 2.2 and trying to run the external povray test. The LLVM Test Suite Guide (http://llvm.org/releases/2.2/docs/TestingGuide.html) Indicates that configuring with “–enable-povray=directory” will do the trick. Unfortunately that doesn’t seem to work. Poking around the config files I saw that “–with-externals=directory” seems to work, but then the script only looks for a povray directory named povray31 within the specified external directory. After getting it to correctly find Povray 3.1 I tried to run the test suite again but it seems to expect Povray to be compiled already. Could somebody point me in the right direction?