Basically, I am wanting to see how much trouble it would be (and if it is even possible) to convert and import our existing database of messages to your database.
Please email me and I will send the message table structure to you
Also, will your product run on Microsoft SQL Server 2005 Express Edition or do you require at least the Workgroup Edition?
SQL server express is not recommended because it does not have the Full-text search capability. As you mentioned in your message, you wanted to be able to search your older messages, which I believe you wanted to utilize the full-text capability that SQL server offers.