Getting a branch?

[Dimitris Mouchritsas]

Hi all,
I'm kind of new in Bazaar and I'm trying to use it in a company that's 
hard on CVS. I've also involved another developer in the team to use
bazaar and try to collaborate. So we have two machines each having its 
own project folder. In my machine I also have another folder from which 
I serve the project for bazaar through sftp (windows 2k btw). The 
problem is the other developer accidentally erased the .bzr directory on 
project so he's out of bzr version control. What should I do so he can 
get back on track? The files that he has are the same as mine, so I 
don't want bazaar to treat them as new. If he deletes the folder and use 
bzr branch then we will loose all CVS information. What should I do?
Thanks.