All your platinum questions are answered right here...
http://cgi.gamefaqs.com/boards/genmessage.asp?board=29924&topic=424703)
It's a very long list of posts, but if you read through them it will answer all your questions. Just remember, the plat. requirements you see in the beginning will be outdated compared to the more recent ones at the end.
I go to Gamefaqs mostly, but I think we could each help each other out in SW games. GameFaqs could definitely help you guys out for platinums, because we've gone through it all. Just remember, even if you have the pc version, its exactly the same as the 64 version.