I'm on my final review for REG, and I concentrated my studying on the 1st 4 chapters of Becker. The last 4 chapters, as you know, are business law which is only about 19% of the exam.
Using logic, I think it is probably best to know the 1st 4 chapters really well, and just be familiar with the last 4 chapters. What are you guys doing? I think it's ridiculous to spend half my study time on a section that is only 19% of the exam. But, then again, I don't want to miss easy points because I couldn't remember some stupid business law rule.