I can give you plenty of thoughts, most of which would start
with "Don't go there!"
You should never, ever have your RH source files
located on your desktop or in the My Documents folder unless you
want to suffer unmentionables at some point in the future. The
reason for this is that in the corporate world, IT Departments
network these areas to allow you to logon to any PC and use your
data. The only problem with this approach is that RH uses an Access
database as part of every project and these babies are prone to all
sort of problems when run over a network.
It is good practice to create a folder off your C: drive
(e.g. C:\RHSource) and to have all your projects in there. All you
need to do is move them using Windows Explorer and then change the
output destination of the single source layouts you use.