I know of tools such as retinize.it and I know of the wordpress retina 2x plugin. They kind of do what I need, but because of some limitations with my current images I need a different method.
I'm a developer and my photoshop skills are sorely lacking.
I think I want to record an action? That I can run though an entire "uploads" directory, which is more than one level deep.
That action needs to double the size (or dpi?) of every image, using automatic scaling (I think that's best right?).
Edit: I should mention I'm using CSS to make these images half their size again... This is what makes these images appear crisp on retina displays, this is how it's done right?