[whpalmer4]

You can't do it on the iPhone in any practical way, but if you have a desktop syncing with your iPhone, doing as ifoner suggests and copying a handful of them into your database, keeping them on hold or filed away in a folder or otherwise out of the way is a practical approach. When you need one, you go to that storage folder, tap the Edit button, select one of the unused projects, make any changes and refile it where you want it with the little file folder icon at the bottom right. Restock the supply closet as needed :)