Hey Gemini, do you have any info about the file format the CLUT-less TIMs are in? I assume they have a .TIM header, but without CLUT data I suppose. You wouldn't be able to post an example of one of the pre-rendered background files your viewer found, would you, either as raw data attached to a post or a snapshot of one of the file headers in hex?
Also, provided you used the dump.exe to get at the CLUT-less TIMs, could you tell us which directory they get put in? Not in CD\ obviously, but perhaps in Rooms\ ?