Hi, I have a Flash 2 Advance for my nintendo SP, can anyone tell me if it will work on the DS to play GBA games? I just ordered a DS and I am deciding if I should get Slot 1 or slot 2 for my new NDS. If the F2A is fully comparable with Nintendo DS, then all I need is to get R4 and I can play both DS games and GBA games on the DS, right? The R4 will be the passme when I play GBA game?