The short answer: don't. Between an older Dell laptop and a newer HP laptop, I've not been able to make all of that work properly. It's not really a RedHat thing, more of a kernel thing. I'm now playing with the test 2.6 kernels, and they do all of this. Because they're still in test mode however, it's a <$%^#> to get them to work properly, at least with the laptops.
Give it a couple months for the 2.6.x series to be supported from redhat (it will be in up2date) and then install that.
That's about the best "newbie" answer I can give. If you're still interested in making it work, go to http://acpi.sourceforge.net/
and follow their directions.