[CentOS] CentOS 5.2 on P5N64

Hi all...

First of all, I'm new to this list. Thanks in advance for the help I  
surely
will get here ;)

I have installed a CentOS 5.2 64 bit on a computer, and I can't get it  
to
boot.
The box is a custom built computer, with this components:

- ASUS P5N64 WS Pro motherboard (nForce 790i Ultra SLI)
   More details here: http://www.asus.com/products.aspx?l1=3&l2=11&l3=653&l4=0&model=2182&modelmenu=1
- Intel Core Quad Q9450
- GeForce GTX 260
- 2x2Gb of 1333 memory
- SATA 500Gb hd and SATA DVD (sata ports 1 and 2).

I booted with the DVD and installed the system fine, but when I try to
boot from the HD, the boot process just stops after inird loading, the  
kernel
doesn't even start.

I also tried with the CentOS 5.2 live CD, but it stops claiming that  
can not
find the boot disk ???

Has someone similar problems ? What could I try to boot ?

TIA

--
J.A. Magallon                       \                     Software is  
like sex:
                                      \               It's better when  
it's free
Mac OS X Leopard 10.5.5 (build 9F33) x86-64 - Darwin Kernel 9.5.0