Hi Chris,
Regarding the possibility of installing on CentOS 4.5 I see no reasons why that should not work. As long as you have a bash, sudo and a JRE > 5 everything should be OK.
As you know Linux distributions can differ a lot in configuration so no there's no guarantee , but with the help of this forum I'm sure we can solve any issues you may encounter.
Best Regards,
Calin