XP Pro and Realtek AC 97 audio soundcard

Ive just installed xp pro on my computer i recently just updated to it to vista and i am restricted on some games that i play so i installed XP Pro on my computer and i noticed i needed to install the soundcard drivers so i installed and it crashed, just restarted itself, so i tried again and the same happened so i downloaded the 3.99 drivers and the same happened, then i googled it but nothing so i went back to XP and tried using the XP Hardware Setup but it did the same at the very end of the setup, thing is the drivers installed on vista. So is there anybody that can put a little light on the subject?