Ironically, I think their official Discord has those guides. (You can join without a Patreon subscription.)
Did you try redownloading it and running the mod by itself? I'm fairly certain the copy in my archive is good (but if it is borked I'll reupload a new copy).
1) No skins like that exist, and I haven't seen any modders working on those sort of human-like skins. But the modding kit is available if you want to take a crack at it (their official release is linked somewhere in this forum).
2) Yes, their official Discord has all the mods, but you need to subscribe to their $2 Patreon at least once and get a permanent role to view the channel. Alternatively, I have an archive here:
You must be registered to see the links
.