Movieclips in an array

From what I can tell, array’s are only good for text?

Because I have 2000 MC’s that I’ve separated into 10 different categories. I really don’t want to create a giant MC with them all in it, so I was thinking of going with an array. I just learned what they are, but I can’t find a tutorial on how not only to create an array with MC’s but also be able to go Next and Prev through them on the stage.

And also, I’m trying to duplicate them too, which I’ve kind of figured out, but what would be the least problematic way of going about deleting, rotating, increase the alpha, flipping, etc. the duplicate MC’s? I was thinking of holding the mouse down on the duplicated MC and clicking on a certain button, but that’s starting to look complicated.