Linux Ubuntu: I don’t see any option for Dual Boot, help!

Hi friends!
Any expert on Linux Ubuntu. I have windows XP on my notebook Compaq presario v2000 and I wanted to load Linux as dual boot. I already tried with Suse Linux, but there was some blank or black screen problem after installation. And someone suggested Ubuntu Linux so I downloaded and burned Ubuntu on a cd.
So during the installation during partitioning there was a serious problem. On Ubuntu webpage they say for partitioning I will get 4 option, but I got only three options in my cd. The missing option was the most important , which was required for dual boot, "Guided resize and use free space".
So i had to abort my Ubuntu installation as using any other option could have effected my current XP installation or might have formatted my whole notebook. So any comment why the dual boot partitioning option was absent in my Ubuntu CD. Or there is some thing to be activated in my notebook setting to enable dual boot? I'll be waiting for your expert advices. thank you!
