AccuRip is actually a Rip program. That you'd use to create halftones and send it to your printer.
However, I use QuikSeps Pro and love it!
It's truly amazing. Not only can it do many types of color separations (spot, simulated process, 4color process, gray seps, index, and more) it also can create your halftones. It does many other processes (which are great!). It comes with a very informative instructional dvd and a pdf book . Steve, the developer, is very helpful and will guide you along if you get stuck.
It's not hard to learn, just lots to it.