[CentOS] CentOS 5.0 suspend to disk (hibernate)

The RHEL 5 release notes for their desktop version claim
 "Improved ACPI support with features such as suspend to disk"
but this isn't working with CentOS 5.

I've installed all the packages and updates for CentOS 5 i386 on a
ThinkPad T43 but when selecting suspend, Gnome pops up a URL to a site
that didn't seem to give a solution.
Gnome makes an entry in /var/log/messages indicating that the suspend
button was pressed, immediately followed by the "Resuming computer" message.

Suspend to ram and suspend to disk work on Ubuntu 6.10 on this machine
with an older kernel (2.6.17-10-generic) than CentOS 5 has.

Are there some packages or a different kernel that should be installed?
Will this feature be added to CentOS 5 or is it considered a server
distro that doesn't need this?
Thinkwiki.org mentions the swsusp program but it seems to be absent.

CentOS 4 and CentOS 5 have been running well on this machine but
having the suspend feature would be very nice.

Thanks, and thanks to the team for making CentOS available.
roland

roland_renaud at Mitel.COM