I wanna upgrade my Centos 4.6 to 5.2

I have installed a package called "centos-release-5-2.el5.centos.i386.rpm", after this I try to run the command "yum upgrade"

It seems run normally, but after it download the package header and Running transaction check, it show the below and nothing done
-----------------------------------------------------------
Error: Missing Dependency: libdb.so.2(GLIBC_2.0) is needed by package gnome-libs
Error: Missing Dependency: libdb.so.2 is needed by package gnome-libs
Error: Missing Dependency: libmysqlclient_r.so.14 is needed by package MySQL-python
Error: Missing Dependency: xorg-x11 is needed by package linuxwacom
Error: Missing Dependency: libttf.so.2 is needed by package VFlib2
Error: Missing Dependency: python-abi = 2.3 is needed by package python-elementtree
Error: Missing Dependency: libmysqlclient_r.so.14(libmysqlclient_14) is needed by package MySQL-python
Error: Unable to satisfy dependencies
Error: Package gnome-libs needs libdb.so.2, this is not available.
Error: Package kudzu needs kernel < 2.6.13, this is not available.
Error: Package VFlib2 needs libttf.so.2, this is not available.
Error: Package MySQL-python needs libmysqlclient_r.so.14, this is not available.
Error: Package hal needs kernel < 2.6.17, this is not available.
Error: Package initscripts needs kernel < 2.6.12, this is not available.
Error: Package autofs needs kernel < 2.6.17, this is not available.
Error: Package linuxwacom needs xorg-x11, this is not available.
Error: Package gnome-libs needs libdb.so.2(GLIBC_2.0), this is not available.
Error: Package lksctp-tools needs kernel < 2.6.10, this is not available.
Error: Package MySQL-python needs libmysqlclient_r.so.14(libmysqlclient_14), this is not available.
Error: Package python-elementtree needs python-abi = 2.3, this is not available.
-----------------------------------------------------------

I have try "yum clean all", "yum update" also. But still error.
Please help! What can I do now?

Most of these are dependent on your currently running kernel. Try upgrading the kernel only first, reboot with the new kernel, then run an upgrade.

Also if you've installed any 3rd party RPM's that aren't part of the CentOS mirrors might cause you some headaches, just strip them out and reinstall if necessary.

Save yourself a lot of time and headaches, just download the install disk and do a fresh install. Even if you eventually get a functional install, using yum upgrade, there are often files left behind that cause issues. I have done a fresh install on a lot of yum upgraded systems that have been slow, acted screwy, or just been unreliable. Poof, with a fresh install, all the bad behavior just disappears.

Sometimes that's just not a viable solution. Yum provides a way to upgrade without or with little downtime if it's a production server or the like.

In the long run it usually actually saves time to do a fresh install vs troubleshooting what yum missed. What I usually try to do is have one extra server(even if it is just strong enough to limp along), upgrade it, swap it in to replace the server that is being upgraded, make sure it runs fine, then upgrade the original server, swap it back in, verify it is functional, then move on.

Real men can upgrade though without reinstalling..

I have try this method, boot with the latest kernel and run yum upgrade again, but problem still here.

First, Thank you everyone!

I have try all the usual method that in forum, but still useless
I cannot do a fresh install, because there are many data inside, reinstall takes me lot of time.

Please Help!