which options to compile into 2.6 kernel for ICH5?

[3pm]

Hi!
I have manualy compiled kernel as described here:
https://forums.gentoo.org/viewtopic.php?t=173260 but i cannot boot (unanble to mount VFS, please append a correct root= etc.)with this kernel when i set in bios my sata operating in enhanced mode. When I set sata in bios auto or legacy mode it boots, but performance is poor as kernel cannot detect sata ICH5 controller (dd write test gives 3MB/sec).
I still able to boot in sata enhanced mode with kernel made with genkernel (also ICH5 apears in dmesg).
I know that stuff... changing root=/dev/hda with sda etc. in grub depending on bios sata mode, so that is not a problem.

There is also another approach to operate sata drives:
http://gentoo-wiki.com/HARDWARE_SATA
It works for me, but ICH5 doesn't appear in dmesg in this case (dd write test gives about 44MB/sec., is it ok for sata!?).
Anyway kernel provided in livecd correctly recognizes my chipset and sata drive in enhanched mode (ICH5 appears in dmesg).
So the question is:
Which options should be enabled and which should be disabled, manually configuring the 2.6 kernel for ICH5 chipset with SATA drive set in BIOS in enhanced mode, to achieve the same result as in livecd kernel?
Which approach is suggested to use?