Question regarding locking

[Mark Lancisi]

I've got two top level projects in a single cvs repository.   I'd like to lock one of those projects. In other words, I'd like for everyone, except maybe one or two users, to be read only users of one of the projects. The other projects needs to remain read/write for all. It looks like I can set this up at the repository level by using the "readers" file. However, I cannot seem to find any info  on the web or reference books that say anything about locking trees at the projects level, or the branch or file level, for that matter.   I figure if a toy Sourcesafe can do this, cvs must have a way.   Thanks in advance for any info..   markl