Computercraft Directories

Okay, so I have been working on a coordinate api for turtles, and I want to place it in the rom/programs/turtle folder, but when I try to copy it using cp, it gives me copy:14:Access denied. So, then I tried looking for the files externally, but to no avail, I could not find them inside the mods folder. I tried creating the folders, but that doesn't work. So can anybody tell where to find the folders, how to get them?

You'll need to create a resource pack.

you may also want to check out the more detailed tutorial on the computercraft wiki: http://www.computercraft.info/wiki/Lua_Resource_Pack_Making_%28Tutorial%29