[CMake] How to set "Look for CMakeDetermine<Lang>.cmake here"

[David Zemon]

I am attempting to build an easy-to-use build system for an embedded 
system. This chip uses .dat, .spin, .cogc, and .ecogc files along with 
.S, .c, and .cpp. I've added the necessary language files to my project 
path which will enable cogc (I'll get to the other file types 
eventually) and they work great, but it requires manually linking or 
copying the files out of the project directory and into CMake's 
installation path. Is there some way to tell CMake that it should look 
for these files in a custom path?

Thanks,
David