It can be done, but it's been a while since I have. My guess would be that
you would first go into the site management section of Server Settings and
unlink the workspace. Then delete the project from draft and published.
Import the new project, go back into the site management and relink to the
new workspace.
Try that in a Test environment first though.
Andrew Lavinsky [MVP] Blog: http://azlav.umtblog.com Twitter: @alavinsky