Odbc and mysql mix?


Can someone tell me if the following setup is possible:

Using FreePBX in a standard way with MySQL, but instead of storing CDR’s in MySQL, store them in an MSSQL database using ODBC. If you adjust the config files in asterisk to do this, will this break anything which FreePBX uses? I also want to use func_odbc for some custom programming, but obviously want the nice GUI for admins.

Thanks in advance