Okay. So I decided to mod my old big DS because this will save me a lot of money in the long run. I have a lot of questions and I have no idea what I am doing. What I want: I want to be able put DS games on a card and play them on my DS. I also want to be able to do the same thing with GBA games, but I was also wondering if there is a way to have GBA cartridges and put different games on them multiple times. 1. What is the best card or setup for me? 2. If I can put GBA games on GBA cartridges, will those cartridges work in the Gamecube Game Boy Player? 3. To put the games on the cards, you just download the game and throw it on the card right? 4. Do these cards have long life spans? 5. Where would you recommend me to go to buy what I need (hopefully at the cheapest price possible)? 6. Anything else I can do to make my DS stronger or pimper? 7. If using a SD card you need a card reader right? 8. It seems like the DS-Xtreme 4GB DS-X is the easiest one to use, but is it also the strongest? 9. Any knowledge on the CycloDS Micro SD (it says it lets you run both DS and GBA games)?