Organic edge is a great book. I was taught ochem by a professor who slammed all the details down our throat. The DAT was more general, so organic edge really helped me prepare. I hadn't had the second half of ochem either so I used it to get basic info on spec, and COOH, NH2 functional groups.
I guess it worked out, 24 (95th percentile) on DAT ochem section. I missed two questions!!
Good Luck!