Oswald's overgrown artpack set up help in Hello Modkit. Thread

The problem is that whenever I put the addon in the content browser, the materials are not transfered propperly. Same with blueprint meshes. They end up missing a texture or two in the graph viewer, and there is no way for me to manually fix those issues. According to the creator, I have to extract the folder to "\HelloNeighborModKit\HelloNeighbor\Mods\TestMod". But if I do that, then how am I supposed to access the assets from the content browser? They never gave instructions on how I'm supposed to access the content. I know this isn't just a me problem because half of the people in the comments section is having trouble but end up getting no answers, and were never given clear instructions in the first place. All the creator said was "Put it into mods first THEN migrate the pack to a different folder in-modkit". But they literally didn't specify what that means. What folder. If I am not allowed to put it into the content browser, then where do they expect me to put the addon files? And how do I fix the broken references?

This is the content pack I am trying to work with right now:

Moddb.com