To separate your card sections in your boxes, you’ll need those letters. From experience for large quantity we advise you to go to Staples because it is also possible to ask them to cut sheet at very little cost.
Our free software Kronocard can be downloaded here.
Here is a link to our full tutorials about scanning and listing cards online using our free software Kronocard: Tutorial
If you are interested in using an auto-feeder to scan in Kronocard here is a quick video that show how it's working in Kronocard.
Here you will find all the information about Kronocard.