I have a question as well. How specifically do you add the HD Starsphere Pack V2 and Dark Blue HUD to Discovery? That's something I've stupidly never been able to figure out on my own. Got these two links, if I missed anything else I need, could you drop the link into the next reply?
First thing to do is extract the contents of the archive. I usually just create a new folder on the desktop and transfer the files there. Next, find your Disco installation folder which is located in C:/Users/<your name>/appdata/local/DiscoveryFreelancer/Data. You will have to make sure that you have allowed hidden files and folders to be shown, or the appdata folder won't be visible.
For the HUD mod, open each ofthe folders you extracted untill you get to the INTERFACE folder. Drag and drop these into the location described above, overwriting when prompted.
The Starsphere is a bit different. It's packed as an flmod. You need to delete that extension and rename it with .zip at the end. You can then use 7zip (it's what I use) to extract the files to a new folder. The only file you want to use is the one named SOLAR. Just drag and drop this folder into the Data folder mentioned above, and overwrite when prompted.
As a precaution, back up your Data folder before overwriting anything, just in case.