Problems after installations
 

Hello everybody
I have some problems after the installation of SL
I just installed the retail dvd using empire efi + retail dvd and everything worked fine. Once I rebooted the system and I'm again in snow leopard I tried to install chameleon and then reboot but when I reboot if I try to boot from the Hard drive instead of the boot cd, I have an error about the boot....so How can i do?

My hardware is:

ASUS p5KE wifi AP
Q6600
NVIDIA gts8800 320mb
HD SATA
DVD connected to usb
ALL drives in AHCI mode
Jmicron disabled

Also I would like to know how to install the right kexts for my motherboard and my videocard..

Please help me THANK YOU