Hi! Im going to buy a DSi and a DSTTi. I'm having som questions. Can I read PDFs with this configration? Can I update the Firmware of my my DSi and still use the DSTTi? (right now I have a DS Lite and a DSTT) Where can I buy a original DSTTi (I'm in germany)? Is there a better flash card than the DSTTi? Why is it better? Thanks in advance!