Yo! Im Bunny 

So You Want To Apply You're Skin, For That
You Have To Do First, Rename You're Minecraft
Skin By "Totem41" 
Then Follow This Path > assets/gamerbunny41/
Then Paste You're Skin There. There I Already
Put A Skin So You Just Have To Replace That 
Skin By You're Skin Thats It! You're Skin Is Applied

So Now You Just Have To Do Open Minecraft
Then Active The "Custom 3D Totems" Pack

Done Now You Can Enjoy This Pack

Thanks For Using This Pack :)