CHIPSET:
Shuold be automatically installed, if ot use this driver:
INF Update Utility - Primarily for Intel&#; 5, 4, 3, Series Chipsets
Download

ICH9 DRIVER
Intel Chipset Installation Utility for ICH9m for Microsoft Windows 7
Download

GRAPHIC:
You can stay with standard VGA graphic, but you can also install the originally XP driver to you windows 7.
Follow instruction here:
Intel / GM/GME Graphics Controllers Driverin windows 7

AUDIO
your audio use
Conexant CX AC97 Audio driver
Download
if failed  follow the instruction here:
Installing Conexant CX AC97 Audio driver in windows 7

WIRELESS:
Your wireless should be automatically installed, if not:

If you have Intel Wireless:
Intel Wireless LAN Driver for Microsoft Windows 7
Download

If you have Broadcom Wireless:
Broadcom Wireless LAN Driver for Microsoft Windows 7
Download 

ETHERNET
REALTEK RTLCL/RTLSb NIC Driver
Download 

BLUETOOTH:
Software Support for HP Integrated Module with Bluetooth Wireless Technology
Download

CARD READER:
Texas Instrument Card Reader
download 

HP Quicklaunch Button
Download(direct)

Im not sure this model have webcam or not, if yes:
Cyberlink YouCam Software
Download