Hi Alain,
Explore "cvs admin -kb top-level-module/sub-module/....../file-name".
>From the man pages:
Usage: cvs admin [options] files...
-a users Append (comma-separated) user names to access list.
-A file Append another file's access list.
-b[rev] Set default branch (highest branch on trunk if
omitted).
-c string Set comment leader.
-e[users] Remove (comma-separated) user names from access
list
(all names if omitted).
-I Run interactively.
-k subst Set keyword substitution mode:
kv (Default) Substitute keyword and value.
kvl Substitute keyword, value, and locker (if any).
k Substitute keyword only.
o Preserve original string.
b Like o, but mark file as binary.
<-------------------------------
v Substitute value only.
HTH,
Chaitanya