Chipset
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26362.exe

VGA, Graphic
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26359.exe

Display
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26364.exe

Sound, Audio
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26358.exe
or

http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=23&PFid=23&Level=4&Conn=3&DownTypeID=3&GetDown=false#AC

(Executable file, a4.04)

LAN, Network
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26363.exe

Modem
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26360.exe