set 1 file in repository to be read only

[Tumy, Brad]

This question is more for a sanity check then anything else.

If I want one specific file in the repository to be read-only (to all
developers) then I just set the permissions on that file (through OS
[Solaris]) to be read-only ...correct? 

We are developing a web-application in Cold Fusion and I want to lock down
the top Application.cfm file so that developers can check it out and include
it in their working directory but not be able to commit it back to the
repository.

Thanks,
Brad