Redmine

Hi everyone, My name is Danny I'm very very new with this application and I couldn't find how to install redmine on a Cpanel Account.
Here I have all the Data that I have to give you...

- My VPS is Centos 5.10 -- Virtuozzo -- WHM/Cpanel version 11.40.0
- I have root access because I'm the owner of my VPS.
- Ruby version 1.8.7
- Gem version 2.1.11

So really I don't know how to install it I tried it but I couldn't done!

If somebody help me will be cool

Thanks