I'm a bit confused with the memory card business. Basically I'm interested in buying a Vita. I can get a 10 game mega pack + 16GB card. does this mean I need to put all 10 games on the card? Can I register and buy games on a PSN plus account then re-download them as many times as i want to the memory card? Basically I don't care if I have 1 or 10 games on my memory card since I only play one game at a time. However, since most of my games will be digital purchases, am I free to download + delete at my leisure?