Compaq Presario C500 Windows XP Driver

AudioConexant Audio Driver (32-bit)
Download

Modem
Conexant Modem Driver for Microsoft Windows XP
Download

Graphic/VGA
Intel 940/943/945 Video Driver (32-bit)
(you must agree with intel L&A)
Download 
(for now my internet at hometown too slow and i cant upload to mediaifre, so i give ziddu instead)
you can also download from intel support here

WIRELESS SOFTWARE
HP Wireless Assistant
Download

ETHERNET:
INTEL pro Network adaptor
Download

if you use realtek:
Download

WIRELESS:
==================
If you have Intel Wireless:
Intel PRO Wireless LAN Driver for Microsoft Windows XP
Download

If you have Broadcom Wireless:
Broadcom Wireless LAN Driver for Microsoft Windows XP
Download
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INPUT DEVICES
Synaptic Touchpad Driver
Download