Netflow database backup

Is there any possible way of backing up the netflow database while the engine is online without using the BackupDB.bat method? (or getting BackupDB.bat to work correctly)

BackupDB.bat does not work as the resultant zip file is 10GB in size and cannot be opened. I believe this is to do with the maximum 2GB size of zip files.

Is it possible to change BackupDB.bat so that it doesn't zip up it's output? Or is it possible to query to database engine directly and write your own backup routine.

We cannot take the netflow analyser engine offline for the time it takes to copy the mysql\data directory, as this takes about 2 1/2 to 3 hours to copy off (approx 65gig of data).

Any help would be greatly appreciated