I'd do it the simple way. Ask the provider of a light set that causes a crash for permission to send a copy of one of the light sets to CL. The idea that "third party" lights causes a crash and so it's not CL's problem is downright silly. A light set is built nativly in Poser, not like an object file. I wouldn't look for fix on lighting in SR4 now though. If they were working a light fix, you'd have gotten a different answer to your question. I've been wondering if CL would release the final SR before Daz Studio is released. Time is getting short.