how to archive the rolling log into a different floder in ent library v4.1

I want to know what is the simplest way to archive my old logs into a folder but not in the main logging file directory. what the hell do I mean?

for example: I logging into a file called "Operation_Log.txt" and I every day\10mb the log is "rolled" and a new Operation_Log.txt" is created and the old file become "$CurrentTime_Operation_Log.txt", I want the "rolled" file to be created in a different directory how can this be done?

Move to Ent Lib 5.0 - in the logging application block there is a new configuration to enable to the saving on only a number of old logs files