1. This should only be used for SQL Server product keys. Lansweeper tries to look for variations of the specified keys, as these may not always be exact.
2. If you submit the 32-bit key, Lansweeper will automatically try to scan the 64-bit variant as well.
3. There is currently no built-in functionality for importing product key data. You have to submit the keys manually or you could write a script to insert the keys.