Do I have to dismount an Exchange 2003 informationn store to move the transaction log location?

I want to move my Exchange transaction logs to a new drive because the disk space is low on the current drive.  After reading through many articles, I'm a bit confused as to whether I need to dismount the store to move the logs.  Something I read earlier seemed to imply that I could change the path and wait for the management process to change to the new drive.  If so, this should happen at midnight in my case.  

Something else I read seemed to imply I could restart the system attendant to immediately push the new settings. Then I could copy the existing logs to the new drive and make sure the date precedes the new files to prevent issues.

The other articles I have read mentioned doing this with the store dismounted as well as a possible registry change for attachement issues.

If possible, I would prefer to do this without dismounting and would appreciate any insight into what I should do.

Thanks in advance.