I just tried to install v1.5.1 on Zencart v1.5. I had already had the v1.5 installed. I installed the sql patch by cutting and pasting the file, but I only have 9 configuration entries, not the 19 mentioned in the readme. I repeated the process, using the file upload process, but no change. In both cases I get a result that it processed 19 files (I think it was 19).