Does Norton Zone allow file locking? Is it suitable for collaboration?

Hi
 
A quick "pre-sales" question: Is Norton Zone suitable for collaboration projects? Specifically does it do file-locking? (whereby a user can see if a file is already being edited elsewhere)

Background
There are about 10 of us working on a project. It is a small project and we only need say 1GB of disk space if that. We have a near zero budget. We are all part time volunteers. We have tried the popular DropBox.com however it does not do file locking and the best we can do is to rename each file (e.g. to the format XXXX_being_edited_by_Fred...) but this painful...
 
We don't want to install new applications like this  before doing due diligence either, partly because the Windows Registry is likely to get bloated and error prone.
 
- Any suggestions?

J