You will have to register or just use the username: driver and password: all You then download the file called aspi460.zip. open it (it is best to open the file in winzip classic) and follow the instructions in the notepad folder which say:
Check your current version with aspichk.exe program.
First SAVE your current files BEFORE replacing..
Adaptec ASPI 4.60
Place apix.vxd in "windows\system\iosubsys\" directory.
Place the other files Aspienum.vxd, Winaspi.dll, Wnaspi32.dll
in "windows\system\" directory.