Hmm. Thanks so much. I managed to figure it out by using the dreamcast bios and delete all files first in order for it to work.
However, i had one question. I downloaded Savegame from Gamefaqs.com for this game "Tokyo Bus guide" and it is in DCI format. When i import the savegame to my memory card and save.
When i load the game using the memory card, the game doesn't recgonise the save, just like there isn't any save file. Why?