Neo Download

Install the chipset first and reboot before installing other drivers:
http://www.nvidia.com/object/nforce_nf4_winxp32_8.26_11.09.html

Graphics:
http://www.nvidia.com/object/winxp_2k_162.18.html

Audio:
Download

Ethernet,try this driver:
Download

Modem:
Download

Gemtek Wireless,requires SP2:
Download

Keyboard:
ftp://ftp.hp.com/pub/softlib/software7/COL15201/ob-40564-2/sp26752.exe

chipset Intel 945G:
Download


ViiV:
Download



Your audio is Realtek ALC888:
sp33867
load UAA first:
Download

then:
Download


Your LAN Realtek RTL8201CL
8201 from realtek:

HP generic:
Download

Original HP Multimedia Keyboard/Mouse Drivers
Download


Original Gemtek USB Wireless LAN Driver
Download


This may or may not work on the TV tuner:
Download