Installation:

1) Download the two compressed files from Blendermarket

2) De-pack the content of the rar files to a place you have around 15GB of free space available

3) Assign the path to this folder in your Blender Preferences

4) You will know have a new Assetl Library available called "Berglmir Alien Rocks", which should look like this:

Please feel ree to rotate, scale, or position any of these rocks to your liking - they work great out of the box, but sometimes altering them, makes them really great!
Enjoy!