Chipset
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26417.exe

VGA, Graphic
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26414.exe

Display
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26419.exe

LAN
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26418.exe

Sound, Audio(from website realtek)
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=24&PFid=24&Level=4&Conn=3&DownTypeID=3&GetDown=false#High%20Definition%20Audio%20Codecs

(Windows 2000, Windows XP/2003(32/64 bits) Driver only (Executable file), r1.89)

Modem
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26415.exe

LAN, Network
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26418.exe

Multimedia Keyboard
ftp://ftp.hp.com/pub/softpaq/sp26001-26500/sp26416.exe