AD LDS with MS-CHAP Question

Hi, Hope someone can help me with this. I was successfully able to get freeradius to work with Microsoft AD LDS (new version of ADAM) with PAP and LDAP authentication. Now I'm working on getting freeradius to work with AD LDS with MS-CHAP. Anybody know if this is possible and if you do can you give me some direction on this? Thanks! Liem