Compiling IM with libjpeg-turbo on Windows 7?

[featheredtar]

I've recently started using IM to process images for a project I'm doing, but have noticed that my previous solution of using the libjpeg-turbo based XNConvert was much faster and more efficient. For example, I could run five instances of XNConvert, with each taking 2 seconds per image, whereas running two mogrify instances renders my computer unusable, and to boot it took around 5 seconds per image.

How do I compile IM to use libjpeg-turbo? I'm using Windows 7, and don't have any experience installing anything manually. Also, would simply changing the JPEG libraries make IM as fast as XNConvert, so that I could run five instances of mogrify with the same 2 second speed as XNConvert?

Thanks.