Question: “Can you program the Olympus DS-2400 Digital Voice Recorder to record in .DSS format rather than it’s default .DS2 format?”
Yes, Olympus has released a firmware update which will allow the DS2400 DVR to record in .DSS format. The firmware update is version 1.02 which includes two updates. Here are the three updates defined:
1. FWUpDssClassic2: This is the firmware update you will apply to have the device record in .DSS format

2. FWUpDssPro2: This is the firmware update you will apply to have the device record in .DS2 format.

http://www.zazaknowledge.com/resources//13756/Olympus/Firmware/DS-2400Firmware.zip  
To install these updates:

1. Download the attachment to your PC.

2. Connect the DS2400 DVR

3. Double-click the update to start the firmware wizard.
Verification Source: In house testing

Test Date: 9.21.11