Memory Card Woes

[Cyber Akuma]

I have two memory card related issues:

1. Has anyone had saves suddenly delete from their memorycards? One day I wanted to play soul calibur and found that there was no SC data on the memcard, everythign else was there though. Same thing happened to Dead Or Alive 2 LE and a few others (Thank GOD I have a double power), these are ALL official sega VMUs. Info Anyone?

2. I dont really have any way to connect my DC to the net unless I hunt down and buy a broadband adapter, and I dont have 100+ to spend on something like that. Anyway, most of the memory card downloads are in .VMI format and all I have is a double power, which uses the .DCI format. Is there ANY way(not just using the double power) to get .VMI saves into my dc other then using the net?