Look in freestuff for CorrectReference (you may have to go to poserpros.com). I reported a bug similiar to what's described above to CL, so maybe the fix will be in the patch(???). The problem I saw was that if you didn't have the texture at the exact location P5 wouldn't find it (for linked runtimes). P4 will find it as long as it's somewhere under the Textures directory.