I attempted to install Windows 7 using bootcamp assistant with a 5GB partition. I got halfway through the Windows 7 install when I got an error message, saying that Windows needs 8284 megabytes to install. I want to delete the current partition and create a larger partition to complete the install. However, when I run bootcamp, I get "The startup disk cannot be partitioned or restored to a single partition. The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows." I tried deleting the partition using disk utility, didn't work either. How can I fix this?