Total Size before shrink means the overall size that is on the current partition on the hard drive as of right now. So if there is only one partition, thats the whole size of the hard drive
Size available to shrink is how much free space within the partition you can shrink. So in sense, this is...
If you have a legit cart for an older 4th gen game, you can transfer from this older game to B/W. As long as the game that is being taken from is an actual game, you can transfer.
I like that games can be fixed after the fact, hate that it's being abused via beta tests... And DLC... I was a 7800 owner back in the day and loved Impossible Mission, turns out I couldn't beat it because it was actually impossible lol