Lightroom 4-How to reorganize files by date when choosing to add rather than copy them to Lightroom

My photos were in disorganized folders on different hard drives. I was able to import them into Lightroom 4 using COPY, and now my folders are reorganized by year and month on my hard drive, which is how I want them. However, I now have a copy of my photos in my catalog and a copy of each photo in my photo folder on my hard drive. This is taking up too much space. Is there a way to have Lightroom automatically import my pictures and reorganize them into folders by date using the ADD option rather than the copy option when importing from my hard drive? Thank you!