Ipsec/VRF Mpls ?

Hi after a first post with 0 answer (very thanks ..) i test a second post for get a small help. I am search a simple sample of configuration for a cisco 2821 for connect a Ipsec routers ton a MPLS IP VPN Backbone My cisco 2821 have two interface, one connected at my MPLS network and the second at the Internet. I create two vrf, one for a site to site and the second for a Remote User Access anyone have this into a config ? because i never have used Ipsec actually on cisco. The site-to-site router are a C1721, and remote user use cisco IPSEC client and i want a radius authentification (and it's the radius that sent the vrf) thanks for your help Stephane