multiple peap authentication source?

hi: i try to setup wireless wpa + freeradius. i use eap-peap-mschapv2, and it was success. i can authenticate users via "users" file and i can authenticate users via winbind+windows 2000 ad server. the next step i want to do is mix both "users" and "windows 2000 ad" as authentication source, but i don't know how to do it. i try to create two "mschap" modules, "mschap-1" and "mschap-2". but i found that the "mschapv2" module internally look at the module named "mschap", so the two modules i create are useless. can i creat a redundant moudle name "mschap" which include two mschap modules? or is there better way doing this? thanks for help!!! Best Regards, tbsky