It used to be the MyScript Notes format from VisionObjects [
www.visionobjects.com] that was used on the DR1000S. iRex used to sell it in the IREX Shop in the early DR1000S days.
However, Vision Objects has moved on from MyScript Notes to the MyScript Studio [
MyScript Studio (Click here)]. You should be able to use the Notes Edition; I'm still using the old version I got with my DR1000S when it first came out. In any case, you can get a free trial version to be sure it works. Let me know if it does work as I may upgrade.
MyScript is really good, it does a lot of lanuages; even complex ones like the two Chinese variants. It only takes a few minutes to train it to your writing style. Even without training it is still very good.
Ride