Just copy and paste between projects.
You cannot have more than one project open.
Another way is to import a whole project into another project and delete what you do not want.
In CS4 you do not have to import the whole project but you can select items.
Watch your rendered avchd files op your pc with Power DVD ultra, it automatically deinterlaces your footage.
No need to make it into a BluRay disk or dvd first just change the extention from m4v to m2ts.