Going to camera previous doesn't guarantee that other settings from your scene (like visible layers) will be restored. My solution is to select the matched photo scene and then switch to parallel projection. When I switch back to perspective, I'm back at the same angle but without the photo. I can then add a new scene and delete the old one. This method doesn't mess with any of your other settings.

You do have to make sure you start from the right place. If you're zoomed in on your photo matched scene, the photo will still show but the new scene you create will be a zoomed version. So click the scene tab before you get started just to make sure it's perfectly set-up.

If you explode the component before grouping the pieces, you might have trouble keeping it away from other geometry. I like to turn all the pieces into a group while they're still inside the component. I just have to double-click to have them nice and isolated, and then select all and make a group. Then when I explode the component, I'm left with the group that was inside, which is what I want. If you do it that way, you won't have to make a copy or reposition it away from the rest of your geometry or anything like that. You might still have to make it unique first, if you have other instances of the component that you don't want to be grouped.