How To Resize ext3 Partitions Without Losing Data in Linux

I had a single unencrypted partition.  I wanted to have an encrypted partition so I had to shrink my existing partition first.  Then, created a new partition and encrypt it using cryptdisk.  Thanks to HOWTOFOURGE.  Please check it out.  The author does his best job writing such a good HOWTO:

http://www.howtoforge.com/linux_resizing_ext3_partitions