NLTM_AUTH (PAP) and MS-CHAP2 together?

After getting NTLM_AUTH working using PAP, I decided to try the MS-CHAP2 as well and that appears to work, but I had to remove the line "DEFAULT Auth-Type := ntlm_auth" from my users file. When I do that MS-CHAP2 works, but PAP doesn't. I will have various radius clients, some of which support MS-CHAP2, but some do not. How can I use both together? My users will be connecting to both services, so defining a specific AUTH-TYPE for each user won't work. -Mike