Thanks for the replies, they were kinder than I expected. I didn't know if there was a specific guide for mountain bike derailleurs. I just went out and worked on it again completely redoing the low and high limits and was able to get it shifting. Apparently last night I was not connecting the cable properly as I am able to shift again. I must have had it in the wrong gear on the shift lever when I was connecting it. Now I look like an idiot. I did get it to shift into all gears on the front and rear, however after adjusting the rear the derailleur rides directly on the largest cog when it's in that gear. That's where the B-screw comes into play, correct?