You try to dual boot or you just want Linux only?
If you want dual boot, this is my experience, after install Linux I can't boot from window. What I do is reformat the Hard disk and reinstall window then
(1) defragment the hard disk.
(2) resize the hard disk.
(3) from window use partition magic to creates Linux and swap partitions.
(4) from window use partition magic to format the Linux and swap partitions created in (3)
(5) install Linux.
after installation, you should be able to boot from either window or Linux at your own choose.