I tried to boot a Dell PowerEdge 850 with Hiren's BootCD but the CERC HBA wasn't recognized. I downloaded latest driver from Dell and checked txtsetup.sif on the BootCD. I found that the hardware id from the downloaded driver wasn't the same as in txtsetup.sif. I added the new hardware id to txtsetup.inf and then it worked.
; The new hardware id
PCI\VEN_9005&DEV_0285&SUBSYS_02911028="CERCSR6"
; The original hardware id
PCI\VEN_101E&DEV_1960&SUBSYS_05111028="CERCSR6"