I guess I'll clarify that the code I posted was the original code giving me the "C:\iteStep\themes\Lock.Solid-0.2\config\lua\... was not found." error. I thought maybe there was something wrong with the $ConfigDir$ variable, so I typed the whole path out (as I did in my first post) and got the same problem.

So, the code I just posted, when run, gives me the
"C:\iteStep\themes\Lock.Solid-0.2\config\lua\lua.lua was not found."
error. (With the strange missing L).