gitweb calls the project ".git"

Hi, I am serving a repository with "git instaweb".

In the web browser, the name in the Project column is only ".git", and  
not the "myrepo.git"
which I would like to have, and as it is on http://repo.or.cz/ (which  
is a site that also uses gitweb).

How do I configure it to serve the project directory (or even better,  
all the repos in a directory), and name them appropriately?

(Is it possible to do with instaweb, or can it only be done with a  
more heavy approach like using apache?)

Thanks for any quick ideas, cheers,
/Lars