CMIIW, but AFAIK there's no simple way to choose multiple cards (besides for custom, which isn't simple).
Here's what I'm thinking:
Create a named list elsewhere that'll be a dropdown, and make cells A33:A55 into drop-downs (to select which cards you have). You can then use vlookup from another tab to find the point variables for each card.
oh right, you're running 2003. In 2010 starter it's not complicated to choose multiple cards just the hidden cells will still run their formulas
Hmmm, maybe 2010 has a formula to check if that item in the list is selsected, IDK.
Lastly, consider renaming your tabs