[CentOS] pppd and radius

I've been googling, but after getting nowhere for a while I thought I'd
ask for a direction to head in. I am replacing a RH7.1 box that was
performing dial-in service using a pppd patched for radius support. I'd
prefer not to do things this way and would like to use a more easily
updated configuration. 

What I need it to do is do auth against a radius server and support
windows clients. What is the RHEL/Centos way of doing this?

alex