stuck on xp installation boot camp

hi to all.

i am trying to install windows xp pro SP2 on mi imac ( latest 10.4 )
while installing, i realised i had lost my product key, so i cannot install.
the cd is inside, i cant eject it, when it boots it continues windows setup.

not looking for a way to install, i want to go back to OSX !!!! please help

turn off your computer?

yeah, and then ?

well when u turn it off and turn it back on, does it go back to the installation screen or what? Maybe try holding the option key on startup and choose Macitosh Hd

yeah it goes to the installation screen, but...
i found my serial thanx guys