[CentOS] LAMP on CentOS 4

Is there a reasonable way to upgrade to the latest Apache, MySQL and PHP packages on a CentOS 4 machine without breaking a bunch of dependencies or upgrading every other package on the machine manually (assuming that would even work)? I'm not having much luck getting an online 4 to 5 upgrade to work on a basic server, so I'm thinking that's not going to be a viable option for all of my remote CentOS 4 installations.

For those who "rent servers" that came pre-loaded with CentOS 4, what do you do if you want to run CentOS 5? Have the ISP run the upgrade from the console for you and hope they can do it with minimal damage to your data? :)

Thanks, Scott