the answer is in the download document if you read it, Larry - and for your KN7000 it's 727 styles - 64MB
You can get away with a 32 MB card with the customs as explained if you bought the 7k book and cd.

any of the alternatives are suitable for you, custom for instant use, or favorites - why bother swapping cards all the time since there is plenty of space left for your own files too, but not all applicable to the 2600 since it has no custom section.