Here ya go: (non-bold lines are ones u should be looking for to find the parts to add)
HIVESYS.INF
HKLM,"SYSTEM\CurrentControlSet\Services\aic78xx\Parameters",,0x00000012
HKLM,"SYSTEM\CurrentControlSet\Services\aic78xx\Parameters\PnpInterface","5",0x00010003,1
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r","ErrorControl",0x00000001,1
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r","Group",0x00000002,"SCSI miniport"
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r","Start",0x00000000,0
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r","Tag",0x00000021,33
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r","Type",0x00000001,1
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r\Parameters",,0x00000012
HKLM,"SYSTEM\CurrentControlSet\Services\si3112r\Parameters\PnpInterface","5",0x00000001,1
HKLM,"SYSTEM\CurrentControlSet\Services\EventLog\System\aic78xx","EventMessageFile",0x00020002,"%SystemRoot%\System32\IoLogMsg.dll"
HKLM,"SYSTEM\CurrentControlSet\Services\EventLog\System\aic78xx","TypesSupported",0x00010003,7
HKLM,"SYSTEM\CurrentControlSet\Services\EventLog\System\si3112r","EventMessageFile",0x00020000,"%SystemRoot%\System32\IoLogMsg.dll"
HKLM,"SYSTEM\CurrentControlSet\Services\EventLog\System\si3112r","TypesSupported",0x00000007,7
TXTSETUP.SIF
aic78u2.sys = 1,,,,,,4_,4,1,,,1,4
aic78xx.sys = 1,,,,,,4_,4,1,,,1,4
si3112r.sys = 1,,,,,,4_,4,1,,,1,4
[SCSI.Load]
cpqarray = cpqarray.sys,4
atapi = atapi.sys,4
aha154x = aha154x.sys,4
sparrow = sparrow.sys,4
symc810 = symc810.sys,4
aic78xx = aic78xx.sys,4
Si3112r = Si3112r.sys,4
[SCSI]
sparrow = "Adaptec AHA-151X/AHA-152X/AIC-6X60 SCSI Adapter"
aha154x = "Adaptec AHA-154X/AHA-164X SCSI Host Adapter"
aic78xx = "Adaptec AHA-294X/AHA-394X/AIC-78XX SCSI Controller"
si3112r = "Silicon Image SiI 3112 SATARaid Controller for Windows XP"
Unnatended.TXT/winnt.sif should be pretty self explanatory, read the thread at abit forums and for which files u need to copy, i included both the files i posted parts from..