The way I understand it, by loading Suikoden and Suikoden II data onto your Suikogaiden game, you can obtain extra scenes. However, due to that fact that Suikogaiden is solely Japanese, one must load data from Japanese copies of these games. Related to that:
Is is Suikoden 1, 2, or both?
Can you have Japanese game saves on an American memory card?
Would one have to obtain a Japanese copy of S1 and 2 or might one be able to conveniently locate a Japanese game save and if so, where?
Would said game saves work on an American DexDrive?