mattos, the only way that you'll be able to update your rosters will be if:
a)you get Action Replay or a X/Shark-Port, find someone with broadband access AND Action Replay or a X/Shark-Port, who can download the updates, save & convert them, then pass them to you.
B) Get A.R/S.P and find a save somewhere on the Net to transfer to your PC
or
C)someone finds a way to convert the PC save files for compatibility to PS2 memory card somehow!!! Actually, this is ONE that IM waiting for!!! (ANyone out there??

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