> cd /usr/local/src
> curl -O http://nginx.org/packages/rhel/6/noarch/RPMS/nginx-release-rhel-6-0.el6.ngx.noarch.rpm
> rpm -ivh nginx-release-rhel-6-0.el6.ngx.noarch.rpm
> yum list nginx
> yum install nginx.x86_64
If using passenger:
> gem install passenger
> passenger-install-nginx-module
# let it run through the install process for you