ETS Paper Tests(Where can I find)? LSAT CR - useful???

Some people have found great value in the LSAT books. That being said, the difficulty of the LSAT problems are well above the difficulty of the GMAT problems. I would not tell you to avoid the LSAT materials, but realize if you're having trouble with CR questions from the OG verbal and the Verbal review book, this might be above what you're looking for.

The old ETS paper tests are not worth more than Powerprep, GMATPrep and the OG books. The ETS questions are retired questions, and the questions from the above three sources are also retired questions.

It would appear to me that you have an approach issue with some of these problems. Would you be a little more specific on where you're having trouble? Maybe then we can provide more guidance.