Here is a quick query that you could schedule to do it nightly:
DECLARE @dd datetime
Select @dd=DateAdd(Day, (0-7), GetDate())
Delete From RadLogs Where LogDate < @dd
--Dale E. Reed Jr. Emerald and RadiusNT__________________________________________IEA Software, Inc. www.iea-software.com
For more information about this list (including removal) go to:http://www.iea-software.com/support/maillists/liststart