I think if I were to have seeds that I purchased from a vendor, I would enter all the plants that were used to make those crosses, in a separate filing cabinet. I would go ahead and create a prefix for them and I would create hybridizer codes for them also. Then I would use the Hybridize Matcher to create those crosses, than go through the step by step process the rest of the way. You could then use the program to name and number your seedlings when you decided you wanted to.