Installing Windows XP SP2 RC1 on an ASUS A2800S... Mission completed!!!
Yesterday I decided to retry to install Windows XP SP2 RC1 on my new notebook (see here for my previous failed tries...).
I installed it, and I started in safe mode. Everything crashed, but I noticed that one of the latest loaded drivers was UAGP35.SYS.
Considering that the boot process messed up all the graphics, and that the PC seemed to work under the Picasso-style screen :-), I booted the system with an Emergency tool and disabled the Microsoft AGP Driver v3.5 (UAGP35.SYS).
The notebook booted, I went into the Device Manager, I selected the "SIS Processor to AGP controller" (that was disabled) and I chose to Rollback the installed driver.
The Device become "PCI Standard PCI-to-PCI bridge", a little reboot and everything works now!!!
I don't understand why if I select Safe Mode or VGA Mode, the bad UAGP35.SYS driver is loaded and the system cannot boot.
Why I've to use a third party tool to save my system?
Hope it helps everybody with the same problem!