Going further with GAR

Apologies to all, but I'm having an attack of the stupids and I can't figure 
out where to go next.

I've read the "Getting started with GAR" stuff, and did that. (Downloaded the 
Debian chroot environment and the tarball with sources.)

Followed the instructions thru the "make build", and everything went fine. As 
best I can tell, it created a good ISO image, the only surprise was that it 
only took a couple of hours instead of the 7-8 the doc lead me to expect. 
(That was probably from pre-loading the packages.)

Problem is, I can't figure out what to do next.  Unless the tarball is being 
rebuilt every few minutes, the packages in the tarball are somewhat out of 
date, so I assumed I need to do something to fetch the latest changes and 
rebuild with current stuff.

I've looked at every piece of documentation I can find, and either somebody's 
assuming I know things I don't, or I'm having an unusually acute case of the 
stupids (which has been known to happen...).

I tried using cvs to "update gar", and it just hummed to itself and quit; 
then I tried looking at the Makefile in /gar/meta/lnx-bbc. "fetch" looked 
promising, but neither it nor "md5sum" did anything. (Actually, I ran 
deep-fetch and deep-md5sum, by analogy with some of the commands mentioned. 
That messed with the right set of files, but didn't update anything.

Reading the cvs manpage, I thought I'd misunderstood, and needed to run 
"update" from within /gar, instead of "co gar" from "/". THAT complained that 
I was missing a version file, and said to run "co gar". Trying that with all 
the stuff in the tarball already there produced lots of errors that "xyz is 
already there. Move it."

So, I can't check things our or update them with CVS, and both the things I 
tried with GAR didn't do anything.

How do I go about updating the gar tree so that it reflects the latest 
changes?

Thanks in advance for any help you can give.

Charles Lacour