If you mean sharing them through Gnutella Network (Limewire's main network), then you cannot share them as DVD. You will need to convert to a smaller format first (max. file size less than 2GB). We at this site do not have any tutorials on how to do this, because there are so many great sites already for that. Here are two, that are considered pretty much the best:

Doom9.net - The Definitive DVD Backup Resource

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