Hi again,
I think I have the solution I needed.
Using Apache::CVS::* modules directly seems to give me exactly what I need.

See the code below that brings me the last revision of a file:

use Apache::CVS::RcsConfig();
use Apache::CVS::PlainFile();
use Apache::CVS::Directory();
use Apache::CVS::File();
use Apache::CVS::Revision();

# /tmp/remote/ is the directory of my CVS module in the repository
my $PATH = "/tmp/remote//VC_DB/utilities/pack_conf.pl";
my $RCSCONFIG = Apache::CVS::RcsConfig->new();

my $file = Apache::CVS::File->new($PATH, $RCSCONFIG);
my $LAST = $file->revision('prev');
print $LAST->content;
[download]

In addition, all of the Apache::CVS::* modules can give a nice and working direct access to the CVS repository.
The main idea is - you don't need to know how it is done !

I believe those modules should be moved from below Apache.

Have a nice day,
shushu