Help Please!

[Wikus Moller]

HELLO,
I am new to linux and I have a pentium 2 upgraded pc running windows xp...
I want to install ubuntu and I have both the pc version and the 64-bit
pc version.
If I put the cd in my pc while its on, it just gives me a menu with
software that I can install but NO INSTALL BUTTON with both the pc and
64-bit pc versions.
If I try to restart my pc, it doesnt do anything!
What should I do to install it? Is there a hidden install button?
MAIL ME

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Thanks
Wikus