The D3000 is not supported in Lightroom for tethering. See: Tethered camera support in Lightroom
Camera Raw is not used by Lightroom. It is the plugin that allows Photoshop to process Raw files. Lightroom has Camera Raw's engine built inside of it. Currently if you are using LR 5.6, you have the equivalent of Camera Raw 8.6.
Thanks for the info guys, time to find a new camera because it looks like there is no program anywhere that will support it.