So you saw how to create partations. If the below videos are not clear please maximize/view in full screen.
This video explains how to create partitions and format with ext2
[youtube=http://www.youtube.com/watch?v=LqF_86iwjIs]
Creating partitions and formatting with ext3
[youtube=http://www.youtube.com/watch?v=VxV5-kx1X3M]