Hi guy2,
I assume you are working with the Ubuntu 9.04 (Jaunty Jackalope) .iso file. Is that correct, i.e. are you installing the file ubuntu-9.04-desktop-i386.iso?
Try reading the following:
Ubuntu Installation Guide. Although it applies mainly to Ubuntu 8.04 (Hardy Heron), it should also help you install 9.04.
If you don't understand something, the best thing to do is to ask a question about what you are having trouble understanding, i.e. ask for help.
-- Tom