I just implemented Lytec today and I was able to import Patient demographics with Import function in it. The import function is available in Client/Server version (or maybe in Professional version also) of Lytec. I am not sure about different versions of Medisoft. You can check with the re-seller you bought it from or they should be able to help you out. I hope you don't have too many to import?
If there are a lot of those, then I would only enter teh basic data that you may need to create a patient record in MS (to speed up migrating all patients for scheduling purposes), and then complete all data entry (ready for claim processing) as they come see you.

HOB