Neo Download

First make sure you already install the
Texas Instruments Media Card Driver:
2.0.0.7 A (sp35308)
Download

After install it only recognize up to 1GB only, so you need to do some work:
1. open run, type "regedit" and then find this line
HKEY_LOCAL_MACHINESYSTEMCo­ ntrolSet001Services ifm21Parameters

Original Key Value: SDParam = 16 (Decimal)
New Key Value: SDParam = 1

Touchpad Driver
6735b Synaptics Touchpad Driver

Audio: (install UAA first adn then Audio)
Universal Audio Architecture (UAA) Bus Driver for High Definition Audio (sp33867)

ADI SoundMAX AD1984A Sound Audio Driver for Windows XP


High-Definition Audio (HDA) Modem Installer and Driver for Windows 2000/XP (32-bit)

VGA/Graphic Driver
ATI Graphics Video VGA Driver and Control Panel for Windows XP

Infineon Trusted Platform Module (TPM) Driver


Quick Launch Driver
HP Quick Launch Buttons

Webcam Driver
Chicony Camera Webcam Driver

Fingerprint Driver
HP Compaq 6735b AuthenTec Fingerprint Driver (32-bit)

HP Multi-WWAN Driver Installer

LAN/Ethernet
Broadcom 57xx Mobile Ethernet Driver Installer for Windows XP/Vista

Wireless
Broadcom Wireless LAN WLAN Driver

Software Support for HP Integrated Module with Bluetooth Wireless Technology

HP Universal PostScript Print Driver (32-bit)

SCR33x USB Smart Card Reader Driver

AMD Driver Support for HP 3D DriveGuard
====================================
AHCI/ for downgrading pupose
HP Compaq 6735b AMD SATA AHCI Controller Driver

1.First make Vista backup. How to do it all informations here.

2.Update Your Bios here.
This is very important for this model. If You will not do this Your audio may not work in XP.

Now You need to slipstream Your Sata drivers (only ICH9M) with nLite.
Download Nlite: Download
Download sata Drivers: Download

Read the Guide here: Slipstream Guide

Be sure also that You are using WinXP SP2 version. If you havent got SP2 version here you can download this service pack: Download

Regarding the driver posted, you might encountered this error message:

1x
Unknown Device - ACPIIFX01021

6x
USB Device - USBROOT_HUB4&136F95F9&0
USB Device - USBROOT_HUB4&CB99714&0

There are 3 flavours of this machine:

SFF, MT and Ultra Slim

MT XP drivers:

http://tinyurl.com/yhqzwm

SFF XP :

http://tinyurl.com/3bgcl9

Ultra SLim XP:

http://tinyurl.com/34pn98


Make sure you have all of them loaded...


This is another important driver for your PC too:

http://tinyurl.com/26pge9

The unknown device was a security driver
HP ProtectTools Embedded Security Module 1.2 located here:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3232108&prodTypeId=12454&prodSeriesId=3232029&swLang=13&taskId=135&swEnvOID=1093#7887

if the above driver didnt work you may try the driver below:
Intel Q965 Express chipset

Your drivers can be located here:

http://downloadfinder.intel.com/scripts-df-external/filter_results.aspx?strTypes=all&ProductID=2529&OSFullName=Windows*+XP+Professional&lang=eng&strOSs=44&submit=Go%21

or,


http://tinyurl.com/yvt2kl

or

http://tinyurl.com/34batf

or

http://tinyurl.com/2a395b

inform me the progress