For the Redhat6.2 version of the kernel to add RAID driver problem

There is a technical problem I want to consult.

In version of Redhat5.5, adding Raid card drivers needs Unzip the initrd.img in Redhat5.5 kernel, In the unzip directory there are the following file: Modinfo, modules.alias, modules.cgz, modules.dep, pci.ids, pcitable etc.. And unzip the Raid card drive, put the corresponding file information into the unzip Redhat kernel file, and then compress the file into initrd.img. At this time the kernel file can identify the Raid card.

But after unzip the kernel file initrd.img in Redhat6.2 version, there have another more Bin files compared to Redhat5.5. In this situation, using the emthod of adding Raid card drivers of V5.5 is unsuccessful.
I would like to consult Redhat6.2 version of the kernel should how to add Raid card drivers?

Please support me,thanks!