Hello Yousefz
With PowerDirector you can open a project within a project with no need to copy and paste. That way you'll keep all your project material together!
It is possible to create a short project, (for example Project 1 ). Finish editing and making sure to save it as Project 1.
Start your next project ( Project 2 ) finish editing that and making sure you save it.
If you continue working in that manner you can create many smaller projects.
For your final project you would create a new project ( Final ) go to your file menu and choose "Open Project" and select your very first edited project.
Once you have opened that project go back to the file menu and choose "Open Project" again,. This time you will be asked if you want to keep your first project material with the latest project, choose "Yes" .
You can continue in this manner to open all your short projects to create a final edit.
Yes, it does sound a bit confusing but I've managed to create a longer project from several shorter projects. Don't forget to "Pack Project" once you have finished, this way you'll keep every last frame intact with your timeline for future editing.
Cheers
I just want to edit and make pictures, walk my dog and go fishing.